Jewelry making tools & machines

We are a leading Manufacturer of diamond sorting sieve, v- tech gemological refractometer and rotating mirror display machine from Coimbatore, India.

Diamond Sorting Sieve

₹ 2,900 /Piece Get Latest Price

Product Brochure
MaterialStainless Steel
Hole Diameter0.5mm
Plate Diameter47mm
ApplicationSorting gemstones and diamonds crystals
Packaging Size42/Set
Country of OriginMade in India

Product Description:

Diamond Sieves make it easy to sort gems by size. Each set contains 42 plates (sieves) with progressively sized holes and a chrome sorting container. The container can also be used to store the sieves when not in use. Used to sort gemstones, gems, stones and diamonds, crystals.
Also Available in
Plate Diameter- 66 mm, 80mm Hole Diameter- 0.6 4.5mm

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported


  • Laboratory Instrument, Test Equipment,
  • Scientific, Measuring, Precision Instrument,
  • Analytical, Bio Medical, Survey, Electrical,
  • Electronic Instruments ,Weather, Metrology.

V- TECH Gemological Refractometer

₹ 55,840 /Piece Get Latest Price

Product Brochure
Model Name/NumberVTR-003
Usage/ApplicationMeasure refractive index of gemstones
Accuracy0.01 RI
Battery Type/LifeAAA Batteries
Measuring Range1.35 - 1.81 RI

The gemological refractometer is a low-cost lightweight measuring instrument used by jewellers and traders of gemstones to measure polished stones over a refractive index range of 1.35 to 1.81 ri and has a clean aluminium table and a built-in light source.The instrument can also be used to identify whether a particular stone is isotropic or anisotropic (uniaxial or biaxial). Gemological (gemstone) refractometer is your primary and most powerful tool in gemstone identification. As with a typical critical angle refractometer, it will measure the refractive index of faceted stones.


  • It has a high hardness CZ test table, with very low dispersion and the shadow edge is straight and clear.
  • Can identify singly doubly refractive gemstones quickly and accurately.
  • Uniquely designed low battery consumption
  • Portable
  • Approved by strict quality and safety standards for a long and trouble-free life Guaranteed, high quality and accurate testing results
Set Includes
  • 1 x Gem Refractometer
  • 1 x Polarizing Filter
  • 1 x Monochromatic Light Filter
  • 2 x 1.5V AAA Battery
  • 1 x Storage Box
  • 1 x Refractometer
  • 1 x 2ml Vial 1.790 Refractive Index Oil

Rotating Mirror Display Machine

₹ 7,000 /Piece Get Latest Price

Product Brochure
Item Size138 * 35mm / 5.43 * 1.38in
Body MaterialStainless Steel
Load Capacity3kg
Battery3 x AA batteries + 1 x 18650 battery (not included)

The turntable is mirror surface, with speed regulation, angle adjustment and directiontransformation. It is a nice display holder for photography, jewelry, exhibition, etc.


  • Three speed regulation, 10 seconds, 15 seconds, 30 seconds.
  • Mirror surface, display the objects with reflection effect.
  • 3kg load capacity, durable to use.
  • Designed for home and exhibition.
  • Perfect for display , model, electronics, decoration and photography.

Nunes Instruments , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty.
Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported
Laboratory Instrument, Test Equipment,Scientific, Measuring, Precision Instrument,Analytical, Bio Medical, Survey, Electrical,Electronic Instruments ,Weather, Metrology.


Contact Us

Krishna Moorthi (Manager Technical)
6, G.j Chandran Shopping Complex, Head Quarters Road
Coimbatore - 641018, Tamil Nadu, India

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