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Gold hallmarking is a procedure for placing a special mark on jewelry and other precious items.

Bavenite Formula Ca4[Be2Al2Si9O26](OH)2 Physical properties Color White, green, pinkish, brown Feature color White Luster

Volcanic stones cannot but attract human attention with their mystery, because they originated in

Home Articles How to calculate the weight of a granite slab Granite is one of the hardest and

Silver is the cheapest metal among those that have the right to be called precious. Jewelry

Since the diamond is the most valuable of the stones, the remaining colorless stones are oriented towards

Post updated: Jul 11, 2020 Gold is a noble metal that has been mined

Gold among ancient peoples The history of this precious metal begins in ancient times. However, archaeological evidence

Silver is the cheapest metal among those that have the right to be called precious. Jewelry

Cold enamel Cold enamel received its purpose due to the peculiarities of the application technique. Before application