Gemstone Tester/Color Estimator Presidium

Cas-Ker is your trusted and timely source for precision watchmakers and jewelers tools and supplies. Family owned and operated since 1927, Cas-Ker has the professional grade jeweler and horological products you need to do the work you love.

PRESIDIUM Gem Indicator (PGI) Colored Gemstone Tester

Presidium Gem Tester II — PERRIN

Presidium Gem Indicator (PGI) Gem Tester, 54-1144

I bought a presidium gem tester and you should too

Presidium MultiTester III Diamond & Moissanite Tester

Gemstone Tester Replacement Pen Probe Presidium

A light and portable instrument that instantly identifies diamonds and most colored gemstones based on their thermal properties. Presidium Gemstone

Presidium PGT-CSE Gem Tester & Colored Stone Estimator

Presidium Adamas Micro Probe Tip

Colored stones Tester

Gemstone Identifier Presidium Refractive Index Meter II

Presidium Diamond Mate A (PDMT-A) - TD5610

Diamond & Gem Tester Tool: Presidium Gem Tester