At least 30 individual, emerald-green DIOPTASE crystals sprinkled on a Dolomite matrix. The largest dioptase crystal is 0.3 inches long. Luster is adamantine. Crystals are rhombohedral shape. The specimen is from the famous TSUMEB Mine in Namibia. From the collection of Kim Cathcart.

Cluster of large emerald-green DIOPTASE crystals on matrix. The two largest dioptase crystals are 0.5 inches long. Luster is adamantine. Crystals are rhombohedral shape. The specimen is from the famous TSUMEB Mine in Namibia. Custom base. Minor white Calcite crystals are sprinkled over the specimen.

Specimen of brilliant GOLD crystals on Sericite matrix. The specimen weighs 54 grams (1.9 ounces). Length is 1.8 inches. El Dorado County, California is famous for its gold production since the California Gold Rush in 1849. 

Brilliant GOLD LEAF from the famous Little Jonny Mine in Leadville, Colorado. The gold weighs 1.1 grams (0.0387 ounces).

Brilliant GOLD LEAF crystals, thumbnail size. Weighs 1.6 grams (0.055 ounces). Length is 0.9 inches. Mariposa County, California is famous for its gold production since the California Gold Rush in 1849. From the collection of Beau Gordon.

Brilliant GOLD LEAF from the famous Little Jonny Mine in Leadville, Colorado. The gold weighs 1.8 grams (0.063 ounces).

ELBAITE crystal with a blue INDICOLITE cap. The blue cap is translucent. Luster is vitreous. The crystal is 1.0 inch in length. Albite is the small white spot on the crystal. This specimen is thumbnail size. ELBAITE is a member of the Tourmaline group. INDICOLITE is the blue variety of Elbaite.

Peach colored, translucent TOPAZ crystal. The terminated end is vitreous but all of the sides are adamantine. There is conchoidal fracturing on one side and the bottom. Topaz is the birthstone for November. This piece is from the collection of Roger Maynard. Roger is a friend and was a long-time geologist with the US Geological Survey in New Mexico.

AQUAMARINE is the sky-blue to sea-green gem variety of BERYL. This Aquamarine is blue in color, gemmy, and transparent. The specimen is terminated with excellent crystal structure. The sides are adamantine while the top is vitreous. There is minor Muscovite (Mica). This piece is from the collection of Roger Maynard. Roger is a friend and long-time geologist with the US Geological Survey in New Mexico.

Olmite

Kalahari Manganese Fields 

Northern Cape Province South Africa  6 x 4.5 x 4 cm

Rocky Mountain Gems and Minerals 

Peach colored TOPAZ crystal. The terminated end is rough but all of the sides are transparent. The white mineral is Albite (Feldspar). The Topaz can be cut into a gemstone. Topaz is the birthstone for November. This piece is from the collection of Roger Maynard. Roger is a friend and was a long-time geologist with the US Geological Survey in New Mexico.

Rhodochrosite, Chalcopyrite, Quartz 

Champion Mine, Cinnamon Pass, Hinsdale County, Colorado 

Rocky Mountain Gems an Minerals

Quartz Pseudo (Possibly Barite)

Keystone Claim / San Juan County, Colorado 

Perfect Specimen 7 x 6 x 2.5 cm / Large crystal 2.9 x 1 x .3 cm

Sponsored by Rocky Mountain Gems and Minerals 

Cluster of green PERIDOT crystals. Peridot is a green, gemmy variety of Forsterite (Olivine). The largest Peridot crystal is 1.1 inches in length. From Pakistan. Peridot is a highly desirable precious gemstone. Peridot is the birthstone for the month of August and the 16th wedding anniversary gemstone. This piece is from the collection of Roger Maynard. Roger is a friend and long-time geologist with the US Geological survey in New Mexico.

HESSONITE is a variety of GROSSULAR GARNET. This specimen is orange in color, gemmy and translucent. Luster is adamantine and size is thumbnail (0.9 inches). From the famous Jeffrey Mine in Quebec, Canada. This piece is from the collection of Roger Maynard. He is a friend and long-time geologist with the US Geological Survey in New Mexico.

Two cubic crystals of the rare mineral BOLEITE. Boleite contains silver, copper, lead and other elements. The larger crystal has a face of 0.4 inches with noticeable wear on the lower half. The smaller cube has no damage. From the type locality of the Boleo District of Baja California Sur, Mexico. The luster is vitreous.