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Assortment 36 piece spring rings doublé silver Ø 4
Next is an in-depth treatment of laboratory-grown or synthetic diamonds
This present volume contains almost fifty new entries of precious stones and synthetics
Big mandrel : 6 to 10 MM
*NEW* GemPen ® Synthetic Tester Measuring Instruments Assortment 36 piece spring ringsProduct Specifications: Hexagonal Pen Grip Interchangeable Filters USB C Standard For Recharging Dust & Rain Proof Shock resistant, with protective casing Highly Durable Easy to use Hard case designed to be used as darkroom GemPen Premium is the most complete kit that we have to offer; It includes all the different filters to screen and analyse Diamonds and to give indications on flame fusion (Verneuil) lab created blue Sapphires. The LW Filter 4 (in
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