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Diamond gauges - sophisticated

Computerised gemstone gauge (presid PGCG)

Computerised gemstone gauge (presid PGCG)

Ref: dg-presid




{Summary}

AS A GEM GAUGE

You might think to yourself: rather than measure a stone, look up charts and formulae, then use a calculator to work out the weight - can't this all be done automatically, with a computer built into the gauge??

The answer is yes. Select the stone on the display, measure it, the weight will be displayed. This is the top model of gauge from the best manufacturers of electronic gem testing equipment.

AS A GEM TESTER

Weigh the stone very accurately on a weighing machine, measure it, the built-in computer will calculate it's specific gravity (SG) and give a suggestion as to what the stone might be. This is not a 'guaranteed' method of identifying gemstones, since many gemstones have similar SGs, but it's useful guide.


{Stones listed}

These are the stones listed, whether you use this as a measuring gauge to see the size (weight) of a stone, or whether you weigh the stone and get the computer to suggest its identity:

Albite feldspar, Alexandrite, Amber, Andradite garnet, Apatite
Benitoite, Beryl, Brazillianite
Calcite, Chalcedony, Coral, Corundum, Cubic zirconium oxide
Danburite, Diamond, Diopside, Dipotase
Fluorite
GGG, Glass
Hematite
Idocrase, Iolite
Jadeite, Jet
Kornerupine, Kyanite
Labradorite
feldspar
Lapis lazuli
Malachite, Microline, Moissanite, Moldavite
Obsidian, Oligoclase feldspar
Pearl, Peridot, Plastic, Pyrope garnet
Quartz
Rhodochrosite, Rhodolite garnet, Rhodonite
Sapphire, Scapolite, Serpentine, Shell, Sinhalite, Sodalite, Spessartite garnet, Sphene, Spinel, Spodumene ,Strontium titanate, Synthetic emerald, Synthetic rutile, Synthetic spinel
TL grossularite garnet, Turquoise
Verdite
Y.A.G.
Zircon (high), Zircon (low), Zircon (medium), Zoisite






Price: 369.00 Including VAT

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Diamond-measuring loupe

Diamond-measuring loupe

Ref: dg-loupe


A micro-printed scale set into an excellent-quality 10X21 magnifier. The scale is marked in points and carats so that you can measure the diamond directly, from 1 point to 4 carat.


Price: 29.50 Including VAT

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Gauge and Book for measuring Diamonds

Gauge and Book for measuring Diamonds

Ref: DGX


A calliper gauge. Measure the diamond, look up the weight pocket book.

More accurate than the simple (with holes) diamond gauge because you are measuring the entire stone instead of just the top (table).


Price: 23.50 Including VAT

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PRESIDIUM DIAMOND GAUGE, DIAL (Presid PDG)

PRESIDIUM DIAMOND GAUGE, DIAL (Presid PDG)

Ref: dg-presid-dial


Abosolutely top quality diamond gauge by Presidium.


Price: 195.00 Including VAT

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DIGITAL DIAMOND GAUGE (PRESID PEGG)

DIGITAL DIAMOND GAUGE (PRESID PEGG)

Ref: dg-presid-PEGG

Measure the diamond horizontally and vertically, look up the measurements in the little book to see the weight, cleverly designed for different shapes not just rounds.

Also included, a chart listing 16 gemstones and a formula. You measure the stone in mm, find yourself a calculator and follow the formula to calulate the weight.

This is the only gauge that can be switched to carat (usually you can only measure in millimetres and must convert it); the only gauge I have seen that has an extra attachment for inserting into small items of jewellery.
Other features: clever power system, to turn it off you simply put the gauge back in its case - and that protects it - it is an exceptionally accurate and sensitive instrument.

SPECIFICATION

Brand: Presidium (the leaders in gem equipment), made in Singapore

Range: 0.01mm to 25.00mm

Tolerances
Readings: ± 0.01mm (i.e. to allow for a reading is being rounded up or down).
Accuracy: maximum error 0.02mm when measuring 25mm. For small measurements (i.e. most diamonds and gemstones) the error would be nominal.

Units: switchable to millimetres or carats

Cuts: it will 'weigh': rounds (brilliants), marquise, square, baguette, emerald-shape, pearl shape.

Power: one CR2032 battery (lasts 16 hours of continuous use). Auto-power-off if not used in 10mns.

Measuring modes (mechanical): with the 'points' for loose stones and most mounted stones; with jewellery attachment for tiny mounts; with the 'wedge' for measuring the insides of holes (e.g. rub-over settings).


Price: 349.00 Including VAT

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Digital Diamond / Gem Gauge

Digital Diamond / Gem Gauge

Ref: DG-DIGI2


Measure the stone, find a calculator, refer to the formula we give you, look up the gemstone (we give you constants for 16 gemstones), calculate the weight.

SPECIFICATION

Brand: unbranded, made in China

Range: 0.01mm to 25.00mm

Tolerances: unknown. I can only guess:
Readings: I'd guess (this is not a guarantee) ± 0.02mm at any reading.
Accuracy: I'd guess (this is not a guarantee) it would be accurate to within 0.1mm when measuring 25mm (the error on smaller measurements would be less).

Units: millimetres or inches

Cuts: it will 'weigh' 12 different shapes

Takes one size LR44 battery (included) - lasts 1 or 2 hours of continuous use.
Need more batteries? - click here

Measuring modes (mechanical): with the 'points' for loose stones and most mounted stones (note, these are 1.8mm in diameter so they will not fit through small mounts to reach the underneath of the stone); or with the 'wedge' for measuring the insides of holes (e.g. rub-over settings).


Price: 82.50 Including VAT

Quantity:  


+ calculator, £4.50, ref calc-1
Price

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