What are the differences in formation and properties between precious gemstones like diamonds, rubies, and sapphires, and semi-precious stones such as amethysts, garnets, and peridots?

What are the differences in formation and properties between precious gemstones like diamonds, rubies, and sapphires, and semi-precious stones such as amethysts, garnets, and peridots?
Admin 3 days, 18 hours ago in Gemstones
0 Answer(s)
arrow_forward