Trolleite is an extremely rare aluminum phosphate mineral that crystallizes in the form of masses and small prismatic crystals. ... The mineral was originally found in Sweden in 1868, and was named after the famed chemist and attorney general, Hans Gabriel Trolle-Wachtmeister. More recently it has been discovered in Australia, Rwanda, Brazil and the USA.

Black obsidian is a glass-like rock that forms from volcanic lava cooling quickly. ... In the western US it is found at many locations in Arizona, California, Idaho, Nevada, New Mexico, Oregon, Washington, and Wyoming. Most obsidian used in the jewelry trade is produced in the United States. Obsidian spear point: A spear point fashioned from opaque black obsidian. Our Beautiful Stones and Crystals come in different shapes, sizes, and colors!

Amethyst is the world's most popular purple gemstone. It has been used in personal adornment for over 2000 years. It is the birthstone of February and an important New Age gem.

Amethyst has a Mohs hardness of 7 and does not break by cleavage. It is a gem that is durable enough for use in rings, earrings, pendants, bracelets and other types of jewelry. Enormous deposits of amethyst in South America and Africa provide enough material to keep amethyst’s price low enough that most people can easily afford it.