The summit and surrounding area are known for their abundances of semiprecious minerals including topaz, red beryl and opal.

[4] Topaz is a semiprecious gemstone that occurs as very hard, transparent crystals in a variety of colors.

Topaz forms within cavities of the volcanic rock rhyolite, from eruptions that occurred during the Tertiary Period six to seven million years ago.

[5] Prices for top quality natural red beryl can be as high as $10,000 per carat for faceted stones.

[6] A variety of other minerals are found at Topaz Mountain including garnet, amethyst, opal, pseudobrookite and hematite.