We are an independent gem testing and jewellery appraisal laboratory. A member of the Singapore Jewellers Association, we specialize in diamond grading, gemstone identification, and jadeite/jade identification. With our experienced gemologists, we offer you services with integrity, reliability and consistency and enjoyable experience learning all about gemstones. In addition, we have years of conducting gem courses for students in Singapore and Asia region. We are also an authorized Gem-A Allied Teaching Centre.

10x Loupe

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- 18mm fully corrected lens - Available in chrome and black (not illustrated) - Leather case included

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Assistance in jewellery auction

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Our lab is fully equipped and we provide the gemstone industry with the highest level of professionalism, reliability and integrity. Diamond grading certification Gemstone & jade identification Verification of certified diamonds and gemstones Jewellery appraisal for insurance, estate/Inheritance tax Assistance in jewellery auction Off-premise testing Besides applying traditional gemological Instrumentation, we also have in-house advanced analytical equipments such as: Infared (FTIR) spectrometer UV-VIS Spectrometer X-ray Precious Metal Analyzer (Fluorescence Spectromater) Megascope (Diamond Proportion Scanning Meter)

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Condensing Sphere

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Condensing Sphere

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Daylight Lamp

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- Flip light with day light bulb for posting stones and diamond - Light weight and easy to carry - 220 - 230V

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Diamond grading certification

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Our lab is fully equipped and we provide the gemstone industry with the highest level of professionalism, reliability and integrity. Diamond grading certification Gemstone & jade identification Verification of certified diamonds and gemstones Jewellery appraisal for insurance, estate/Inheritance tax Assistance in jewellery auction Off-premise testing Besides applying traditional gemological Instrumentation, we also have in-house advanced analytical equipments such as: Infared (FTIR) spectrometer UV-VIS Spectrometer X-ray Precious Metal Analyzer (Fluorescence Spectromater) Megascope (Diamond Proportion Scanning Meter)

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Dichroscope (Calcite)

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- Observe pheochroism in anisotropic (doubly refractive) gemstones - Quickly separate doubly refractive gemstones from singly refractive gemstones. eg ruby and garnet

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Dictionary of Gems and Jewelery

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Dictionary of Gems and Jewelery English - chinese Chinese - english Pricing for set of two

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Fibre Optic Lamp

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- Fully flexible fibre optic tubes allowing cool white light to be positioned where you need it - Excellent source of light for use with the microscope, spectroscope and refractometer - High intensity halogen bulb with rheostat - Available in single or double fibre tubes (not illustrated), 75cm in length - 230V

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Gemstone & jade identification

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Our lab is fully equipped and we provide the gemstone industry with the highest level of professionalism, reliability and integrity. Diamond grading certification Gemstone & jade identification Verification of certified diamonds and gemstones Jewellery appraisal for insurance, estate/Inheritance tax Assistance in jewellery auction Off-premise testing Besides applying traditional gemological Instrumentation, we also have in-house advanced analytical equipments such as: Infared (FTIR) spectrometer UV-VIS Spectrometer X-ray Precious Metal Analyzer (Fluorescence Spectromater) Megascope (Diamond Proportion Scanning Meter)

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Jade Collection and carving

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Jade Collection and carving

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Jewellery appraisal for insurance, estate/Inheritance tax

http://www.ngi.com.sg

Our lab is fully equipped and we provide the gemstone industry with the highest level of professionalism, reliability and integrity. Diamond grading certification Gemstone & jade identification Verification of certified diamonds and gemstones Jewellery appraisal for insurance, estate/Inheritance tax Assistance in jewellery auction Off-premise testing Besides applying traditional gemological Instrumentation, we also have in-house advanced analytical equipments such as: Infared (FTIR) spectrometer UV-VIS Spectrometer X-ray Precious Metal Analyzer (Fluorescence Spectromater) Megascope (Diamond Proportion Scanning Meter)

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LW for UV lamps

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LW for UV lamps

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Microscope

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- Magnification range from 10x to 160x - 10x and 20x eyepieces supplied - Darkfield/brightfield illumination with sliding baffle, 30 watt tungsten halogen bulb with rheostat, overhead fluorescent light and iris diaphragm - Gemstone holder - 220V to 230V

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Microscope bulb (30w/110v)

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Microscope bulb (30w/110v)

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Off-premise testing

http://www.ngi.com.sg

Our lab is fully equipped and we provide the gemstone industry with the highest level of professionalism, reliability and integrity. Diamond grading certification Gemstone & jade identification Verification of certified diamonds and gemstones Jewellery appraisal for insurance, estate/Inheritance tax Assistance in jewellery auction Off-premise testing Besides applying traditional gemological Instrumentation, we also have in-house advanced analytical equipments such as: Infared (FTIR) spectrometer UV-VIS Spectrometer X-ray Precious Metal Analyzer (Fluorescence Spectromater) Megascope (Diamond Proportion Scanning Meter)

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Photo Atlas Of Inclusions In Gemstones

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Photo Atlas Of Inclusions In Gemstones

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Polariscope

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- High quality instument for rapid identification of single and double refraction in rough and cut stones. - Can detect strain in gemstones - With optional conoscope rod (condensing sphere) to detect interference figures in anisotropic gemstones - uniaxial or biaxial. - With rotating dish - 220V to 230V

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Polariscope bulb (20w/110v)

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Polariscope bulb (20w/110v)

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ITEM #: PCS-100

Presidium Carat Scales

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The Presidium carat Scale (PCS-100) is the latest innovation of Carat weighing technology. It ulitilizes the most advance semiconductors to enchance the accuracy and stability of the scales for long and countinuous operation. FEATURES 100.00 carats (20.000gm) weighing capacity 0.01 carat (0.002gm) graduation. Selection mode: gram/carat/ ozt/ grain Powered by: 4x AAA batteries or AC 120/230 V adaptor. ( Battery and AC adaptor are optional) Low voltage indicator Automatic power down after 10 minutes from the last measurement. 1 year factory warranty

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ITEM #: PDG

Presidium Dial Gauge

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Speed up your diamond and weight estimating with the latest product from PRESIDIUM. The easy-to-read millimetre and carats scale eliminate eye fatigue to minimize human error. Even a small miscalculation can be costly when dealing in highly priced goods. The PRESIDIUM DIAL GAUGE measures from 0.0 to 23.0 mm in 0.1mm / divisions. One revolution equals 10 mm. Longer Lasting Accuracy: The hardened anvils resist wear and maintain accuracy for much longer periods. Only the PRESIDIUM DIAL GAUGE incorporates the latest state-of-the-art patented non-metallic lubrication free rack and pinion technology. Instrumental Error +0.05 mm. Zeroing a simple realignment is all thats required.

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ITEM #: PDMT

Presidium Diamond Mate

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The PRESIDIUM DIAMONDMATE utilizes proven thermal conductivity testing method to instantly verify the authenticity of diamonds. The test results are indicated by visual light and audible beeps. FEATURES Available in two models: (a) DiamondMate-A operates on alkaline (AAA) batteries or direct AC current and, (b) DiamondMate-C operates on rechargeable (NICAD) batteries or direct AC current. No waiting time between tests. Pocket size. Low batteries indicator. Metal detector - intermittent beep. Measured diamond - continuous beep. Low battery consumption. Carrying case - standard for all models Size : L-160mm x W-21mm x H-30mm Weight : 45 gms

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ITEM #: PDT

Presidium Duo Tester

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Portable Diamond Testing with THERMAL CONDUCTIVITY and REFLECTIVITY measuring in the same Affordable instrument!! Double the confidence in testing for diamonds against all known simulants, including Synthetic Moissanite!! The PRESIDIUM DUOTESTER is the only tool on the market that provides the user with two proven tests for diamonds and the ability to differentiate between similarly colored gemstones. The easy-to-read dial of the DUOTESTER is calibrated to indicate the differences in thermal conductivity of the most popular gemstones and simulants. Simply touch the tip of the thermal conductivity probe pen to a mounted or loose stone. Size : L-165mm x W-77mm x H-77mm Weight : 319 gms

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ITEM #: PEGG

Presidium Electronic Gemstone Gauge

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PRESIDIUM brings you the FIRST ELECTRONIC GEMSTONE GAUGE DIRECT DIGITAL READOUT ELIMINATES ERRORS Speed up your diamond and gemstone measuring with the new, high-tech ELECTRONIC GEMSTONE GAUGE Digital display eliminates eye fatigue when measuring stones over prolonged periods. Accurately measures to 1/100 mm -eliminating even the smallest miscalculations. IDEAL FOR CALIBRATING MELEE& MATCHING GEMSTONES INCLUDES PRESIDIUM GEMSTONE WEIGHT ESTIMATION TABLE A convenient booklet for estimating the carat weight of round brilliant and fancy cut diamonds. INCLUDES HIGH SETTING ATTACHMENT WITH TOUCH BUTTON ZERO SETTING Lets you measure mounted gemstones. Touch button zeroing makes subtracting unnecessary. No complicated adjustments, The ELECTRONIC GEMSTONE GAUGE does it for you.

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ITEM #: PGT/CSE

Presidium Gem Tester

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The Presidium Gem Tester / Color Stone Estimator provides a quick, easy, laboratory proven way to identify diamond and separate the most popular colored gem stones from one another. This valuable tool can eliminate human error when identifying precious gems. The Presidium Gem Testers accurate performance is based on the fact that different gem stones conduct heat at different rates. Simply touched the Gem Testers sophisticated thermoelectric probe to ther surface of any mounted or loose stone and the specially calibrated dial will show you the relative heat conductivity of the material. Size : L-165mm x W-77mm x H-77mm Weight : 272gms

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ITEM #: PIREM

Presidium Inside Ring Engraving Machine

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Inside Ring Engraving Machine will be a great companion for you in engraving. The Inside Ring Engraving Machine is manufactured to the highest standard with hardened powder-coated paintwork. The machine is compact, user-friendly and is come bundled with an engraving diamond tip, a circular dial template, a complete set of operating instruction, dust cover and 5 brass sample rings. ADVANTAGE Compact 410mmH x 240mmW x 260mmL. Easy template installation. One single template produces letters with heights of I mm and 2mm. Wide ring-holding capacity of ring sizes from 19 to 30mm. Adjustable letter spacing. 100% spare parts replacement. 1 year factory warranty

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ITEM #: PJEM

Presidium Jewellery Engraving Machine

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PRESIDIUM Jewellery Engraving Machine is manufactured to the highest standard with harden and powder coated paint work. This machine helps to increase your sales & profits and make every Jewellery sale a final sale. The machine is user friendly and delivery include an engraving diamond tip, a complete set of operating instruction, set of 6 male pins, 2 pieces end stop, dust cover and 10 blanks aluminium. test plate. FEATURES Pantograph ratio from 2 1/2: 1 to 6: 1. 360 rotating vise with 8 indexing positions. Work holding from 3 x 3 mm up to 50 x 76 mm. Height adjustment up to 115 mm. Easy template (type) insertion. Adjustable template (type) holder accommodates both small 31.75 mm and large 69.85 mm blanks. Machine measurement 265 mm H x 315 mm W x 330 mm D. 100% spare parts replacement.

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ITEM #: PMT

Presidium Moissanite Tester

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As the world foremost manufacturer of Thermal Conductivity Tester, Presidium is answering her customers' demand for a reliable handheld Moissanite Tester. It took us many months of intensive research and development and a solution was found within our group-patented technology. This tester is therefore developed with the sole objective to identify synthetic Moissanite (Silicon Carbide). The new instrument is named "PRESIDIUM MOISSANITE TESTER" (PMT) and uses the technology of Capacitance and for the capacitive measurement of electrical displacement. PMT is designed specifically for identification of Synthetic Moissanite mounted on metals. The measuring procedure is very simple by touching a high sensitive measuring probe made of special grade polymer and the reading is instantaneous.

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ITEM #: PMuT

Presidium Multi Tester

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The Presidium Multi Tester (PMuT) utilizes the combine principles of Thermal and Electrical Conductivity from our patented technology. The measuring probes together with the electronics circuitries are designed to pick up and segregate data collected from the stones via a customized micro-controller. Within a split of a second, the test result will be displayed. FEATURES Surface Mount Technology . Retractable Tip to ensure the accuracy and consistent pressure between the measuring probe and gemstone. No waiting time between tests. Clear LED display for Diamond, Moissanite, Simulants and Metal. Built-in metal detector. Low batteries indicator. Automatic power down . Pocket Size L-160mm x W-42mm x T-22mm Weight : 97 grams with batteries

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Prism Spectroscope

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- Small and handy instrument that include a fixed slit - Adjustable tube focus for clear spectra

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R.I. Liquid (1.79)

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10ml, approx 30g

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Refractometer

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- With a built-in monochromatic filter and a polarizing filter - Adjustable eye piece for easy focusing - Clear readings may be obtained using a wide range of white light sources including fibre optic lamps - Suitable for testing faceted or cabochon, loose or mounted gemstones - Travelling case and small bottle of R.I liquid provided

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SW for UV lamps

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SW for UV lamps

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Training Institution

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Dedicated classroom set-up for optimum learning experience. Individual set of instruments for each participant to practice with. Large collection of specimen stones for all practical sessions. Large collection of displayed sample stones to enhance learning. Learn the latest development in the trade from our laboratory department. More effective learning with our single phase programs, no time wastage between phases. Programs are facilitated by qualified and experienced gemologist-trainers. Course features: Practical oriented training with more than 50% of time dedicated to practice. Extensive learning of up to 40 hours, well-spaced over two-month period for ideal adult learning.

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Ultraviolet (UV) Lamp

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- Easily switch between long wave (LW) and short wave (SW) - Viewing window protects your eyes from harmful shortwave ultraviolet (Caution: never look directly at any ultraviolet light source, particularly short wave, as they can cause damage to your eyes) - Useful in separating diamond from simulants, and natural stones from man-made materials - 220V to 230V

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Verification of certified diamonds and gemstones

http://www.ngi.com.sg

Our lab is fully equipped and we provide the gemstone industry with the highest level of professionalism, reliability and integrity. Diamond grading certification Gemstone & jade identification Verification of certified diamonds and gemstones Jewellery appraisal for insurance, estate/Inheritance tax Assistance in jewellery auction Off-premise testing Besides applying traditional gemological Instrumentation, we also have in-house advanced analytical equipments such as: Infared (FTIR) spectrometer UV-VIS Spectrometer X-ray Precious Metal Analyzer (Fluorescence Spectromater) Megascope (Diamond Proportion Scanning Meter)

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Sales Person

Sales



Tel : 6333 6238
Fax : 6333 6282
Email : enquiries@ngi.com.sg

Jewellery Quality

Our lab is fully equipped and we provide the gemstone industry with the highest level of professionalism, reliability and integrity. Besides applying traditional gemological Instrumentation, we also have in-house advanced analytical equipment.

News & Events

Clients Testimonials

  • Awesome services. Very helpful person.

    DL

  • Good Services!

    John Lee

Our Products

There are three main services that NGI provides: Gemological Education and Training Certification and Appraisal services for gemstones and jewellery Sales and service of gem testing instruments To date, the company has served a wide variety of customers, including professionals from the jewellery trade, pawnshops, insurers, financial institutions, auction house and individuals.