Copper & Agate
The El-Dorado Topaz, which weighs a whopping 31,000 carats (13.67 lbs.) currently holds the crown as the largest faceted gemstone in the world. Originally discovered in 1984 in mineral-rich Minas Gerais, Brazil, the pre-cut El-Dorado crystal tipped the scales at a mind-boggling 81.57 lbs.
Crystal Sun Academy Quartz on Rosacite after Azurite. From the Tsumeb Mine, Namibia.
Marin Mineral Company - Tucson 2014 - Thumbnails
They're asking $17,000 for this Sugilite!
moqui marbles, utah Iron oxide concretions (Moqui marbles) Moqui Marbles, hematite concretions, from the Navajo Sandstone of southeast Utah. Scale cube, with "W", is one centimeter square. The Navajo Sandstone is also well known among rockhounds for its hundreds of thousands of iron oxide concretions
Cuprite Photo Copyright © Chinellato Matteo - Chinellatophoto.com - This image is copyrighted. Unauthorized reproduction prohibited. Locality: Madonna di Fucinaia (Madonna della Fucinaia; slag locality), Campiglia Marittima, Livorno Province, Tuscany, Italy Perfect 0.76 mm octhaedron of Cuprite. Collection Francesco Bonotti photo Matteo Chinellato