Lake Superior Agates are primarily composed of chalcedony, a mineral in the quartz family, but they also contain a variety of other minerals that contribute to their distinctive colors and patterns. Here are some mineral names that may make up the colors of a Lake Superior Agate: Hematite - a mineral that is often found in iron-rich rocks and can create shades of red, brown, and orange in agates. Goethite - another iron mineral that can create reddish-brown colors in agates. Iron oxide - a gener

Chalcedony (stalactites)

Chalcedony Gem Guide and Properties Chart

Blue floating orbs in chalcedony are one of the rarest colors in translucent Ocean Jasper 2005/06. #1 Quality vein 2 era. Have you ever seen it, or knew that it existed?! Here’s a large cabochon/medallion I finished. 46mm x 34mm. This was mainly to secure the area out of a slab that was already cut. I selected this rough in Tucson, and cut the slabs after 2009. There was only 2 pieces that were similar out of a batch that I went through. Maybe this second stone will have it as well ?! **stone is

Unique Chalcedony coated Chrysocolla