Diamond and Gem Testers

Plastic Stone and Pearl Sorting Tray
For stringing and sorting stones and pearls.
Black colour.
Size: 100 x 65 mm.

Plastic Stone and Pearl Sorting TrayFor stringing and sorting stones and pearls.White colour.Size: 100 x 65 mm.

Diamond parcel papers White-Blue
Outside White, Blue inside.
Size: mm 80 x 45.
Pack of 25.

Diamond parcel papers White-White
Outside White, White inside.
Size: mm 80 x 45.
Pack of 25.

Cardboard display for gems and precious stones
Optical white with a matt finish.
Dimensions: 160 x 85 mm.
Pack of 25 cards.

Cardboard display for gems and precious stones
Optical white with a matt finish.
Dimensions: 125 x 90 mm.
Pack of 25 cards.

Diamond parcel papers White WE

Sorting Tray

Power Adaptor compatible with Presidium Multi Tester III
Can be used for various worldwide plugs and recommended for use with specified Presidium products only.

Gemstone Display Boxes in Eco-leather case

Refractometer Fluid
1.79 Contact fluid for prism refractometer.
Bottle 10 Ml.

Thickness Gauge

Stone Sieve Set Ø 80 mm
With 42 plates, size from 000 to 20 (0,90 - 4,5 mm).
For sorting stones, beads and pearls according to size.
Precision-drilled, polished sieves fit into chrome-plated steel cylinder. 
Plate sizes are clearly marked for easy identification. 

Presidium Diamond Mate Tester

Moissanite Tester II

The polariscope is an essential tool in gemology.
It uses polarized light to analyze the internal structure of precious stones.
Optical distinction: Identify whether a gem is monophytic (remains dark when rotated, like a diamond) or birefringent (changes brightness, like a ruby).
Rapid identification: Allows you to quickly exclude certain minerals or distinguish natural gems from glass imitations.
Stress analysis: Reveals structural anomalies and internal stresses that suggest the stone's origin or possible treatments.

Presidium Stone Gauge

Presidium Multi Tester III 
A pocket-sized instrument that instantly identifies diamonds and moissanites based on their thermal and electrical properties. 
PMuT III tests diamonds as small as 0.02ct.

PRESIDIUM Electronic Gemstone Gauge
Instantly converts millimeter readings to carats for round brilliant-cut gemstones.
Measures gemstone dimensions with accuracy to 0.01 mm.
Clear and visible digital display with readings in mm or ct.
Light and portable instrument that can be used anywhere.

Manual Refractometer

Presidium Refractive Index Meter II

Presidium Gem Indicator

PRESIDIUM Gem Computer Gauge

Stereoscopical Microscope Optika SLX-2
Slim and easy to carry, it is equipped with long lasting LED illumination to provide over 20 years of use.
Head: Binocular, 45° inclined; 360° rotating.
Dioptric adjustment: Both eyepieces.
Eyepieces: WF10x/21 mm, high eyepoint, secured by screw and with rubber cups.
Objective: Parfocal achromatic zoom 0.7x…4.5x (6.43:1 ratio) with anti-fungus treatment.
Working distance: 100 mm.
Stand: High-grade, precision fixed with handle and focus.

Stereoscopical Microscope Optika SLX-5 with long overhanging stand
In case illumination is needed, choose the LED ring light illuminator.
Head: Trinocular, 45° inclined; 360° rotating.
Dioptric adjustment: Both eyepieces.
Eyepieces: WF10x/21 mm, high eyepoint, secured by screw and with rubber cups.
Objective: Parfocal achromatic zoom 0.7x…4.5x (6.43:1 ratio) with anti-fungus treatment.
Working distance: 100 mm.
Stand: Overhanging stand 420 mm high, 430 mm horizontal arm length, base 230×230 mm.

Presidium Synthetic Diamond Screener II (SDS II)
Help to screen out Type IIa diamonds likely to be laboratory-grown diamonds.    
Tests on diamonds within a range in dimension from 1.5 mm in width and up to 5 mm in height (approx. 0.02 to 10 carat size).
Tests on polished diamonds of popular cuts such as brilliant round cut, emerald cut, baguette cut, etc.    
Can be used on both loose and mounted diamonds (on jewelry with open-back setting).
For use on colorless diamonds from D Color down to J Color.

Gemlogis Belize Natural Diamond Segregator
The industry's first twin probe tip tester, very simple to use.
It combines a Thermal Probe and Optical Probe to differentiate an earth-mined, synthetic diamond, moissanite, or simulant.
It is designed to test on any jewelry mounting (Either closed or open-back).A first test checks whether moissanite or diamond. The second test identifies synthetic or earth-mined diamond.