Gauges
The Presidium Gem Tester II (PGT II) features a clear and direct analog display for a quick way to identify diamonds/moissanite and separate up to 15 common colored gemstones from one another based on their thermal conductivity. It still features a retractable probe tip that ensures consistent pressure against the gemstone during tests resulting in more reliable results. With the industry’s thinnest probe tip size of 0.6mm, the PGT II tests gemstones as small as 0.02ct.
The holes in the gauge are used to measure stones, while the extensions are used to measure mountings. One side shows millimeters, the other side shows the corresponding carat measurements.
Graduated in millimeters across the top and 1/32″ increments across the lower half. All graduations are deeply etched.
Length 6″ (150 mm), width 1/2″ (12.7 mm)
Computes weight of diamond without removing stone from mounting. Width and depth are measured with caliper and compared with measurements in table. For round and fancy shapes.
This fine 6″ steel ruler is useful for quick measurements or scribing lines and features a hole in one end for hanging and includes a handy conversion chart on the back – inches to millimeters.
Indispensable gauge helps to size gemstones quickly and accurately. Sizes range from 1 pt. to 2.1 ct., plus baguettes. Aluminum disks fold together when not in use.
Ideal for closing the sale without using expensive stones. Cubic zirconia, mounted on stainless steel arms, folds within a protective cover when not in use. Each arm has the size of the stone in carats and millimeters. Comes in compact leather case. Ten sizes ranging from 0.10 to 2 carats
Popular for use with rubberized abrasives. Sold by dozen.
With brass collar. Used with rubber points. Sold by dozen.