91 results for amethyst

What is Rock Tumbling? Rock tumbling is a fun way of polishing multiple semiprecious gemstones simultaneously in a rock tumbler. A rock tumbler is a piece of equipment that has a plastic or r ...

In Part 1 of my All About Macrocrystalline Quartz series we discussed the basics of Macrocrystalline Quartz: science, nomenclature, varieties, and uses.In Part 2 we discussed Quartz crystal ...