Browse Items (99 total) Tags: Rocks and Minerals Browse All Browse by Tag Search Items Previous Page of 10 Next Page Sort by: Title Creator Date Added Agate Two oval white agate cabochons, all polished. Cut by donor. Part of a polished stones collection. Tags: Geology, Rocks and Minerals Agate Black stripped agate. Irregularly-shaped agate stone, all polished, with black concentric rings. Cut by donor. Part of a polished stones collection. Tags: Geology, Rocks and Minerals Agate, Dendritic One specimen of light reddish-brown agate with numerous patches of black dendrites. Tags: Geology, Kansas, North America, Rocks and Minerals, United States Allanite All the samples are contained in one large gar or vial. Those inside are a sand size mix of the mineral and two small vials. Tags: Geology, Rocks and Minerals Amethyst Large specimen of dark purple amethyst quartz crystals. Tags: Canada, Geology, North America, Ontario, Purple, Rocks and Minerals Anglesite Specimen consists of massive anglesite, malachite, quartz and azurite. Azurite also occurs as small crystals filling veins. Tags: California, Geology, North America, Rocks and Minerals, United States Antimony This specimen is a concentrate of antimony, probably from a smelting operation of some type. Tags: Australia, Geology, Gray, Rocks and Minerals Apophyllite One specimen of colorless to white, tetragonal crystals of apophyllite, on a massive amethyst quartz. Collected by A. E. Foote. Tags: Geology, Mexico, North America, Rocks and Minerals Aragonite, Rosette Part of rosette, polished cross section piece of tan-yellow and brown, on one face, outside is rough, and is a dirty yellow color. Tags: Brown, Geology, North America, Rocks and Minerals, Texas, United States, Yellow Augite Two small vial samples. Tags: Geology, Rocks and Minerals Previous Page of 10 Next Page Featured Item Dinosaur Includes the 1st phalanx of 2nd metatarsal of right hind foot.