topaz gemstones Topaz, Utah's state gem, is a semiprecious gemstone that occurs as very hard, transparent crystals in a variety of colors. The topaz crystals at Topaz Mountain are naturally amber colored, but become colorless after exposure to sunlight. The crystals formed within cavities of the Topaz Mountain Rhyolite, a volcanic rock which erupted approximately six to seven million years ago (Tertiary Period) from volcanic vents along faults in the area.

How to get there: From Nephi, Utah, travel 33 miles southwest on State Highway 132 to Lynndyl. Turn south on U.S. Highway 6 and drive for approximately five miles. Turn west on the Brush Wellman road and travel 38 miles until you reach the Topaz Mountain sign. Turn north on the dirt road and drive about two miles, then turn west toward Topaz Mountain. See ourĀ rockhounding map.

topaz mountain Useful maps: Utah highway map, Lynndyl and Fish Springs 1:100,000-scale topographic maps, Topaz Mountain East 7.5-minute topographic map, and the Bureau of Land Management (BLM) Recreation and Vehicle Guide to the House Range Resource Area map.

Topographic maps can be obtained from:

Natural Resources Map & Bookstore
1594 North Temple
Salt Lake City, UT 84114
(801) 537-3320 or 1-888-UTAH MAP

Bureau of Land Management maps are available from:

BLM Utah Office
324 South State
Salt Lake City, UT 84114
(801) 539-4001