Iolite is a magnesium iron aluminium cyclosilicate. Iron is almost always present and...
Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases, is an opaque, impure...
Jaspilite is a chemical rock formed similar to chert, but is generally quite...
K2 is a newly discovered crystal that was found at the peak...
This new material from Utah is not agate as many rocks are named but...
Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases,...
Kambaba Jasper is a sedimentary stone composed of microcrystalline quartz and interlaced with...
Kona Dolomite is named after the Kona Hills south of Marquette County, Michigan...
Labradorite ((Ca, Na)(Al, Si)4O8), a feldspar mineral, is an intermediate to calcic member...
Laguna Lace Agate is a stone of prominent color. The color energy of...
Lake Superior agate is a type of agate stained by iron and...
Lapis Lace Onyx is a blend of Scheelite, Dolomite and Calcite. Notably,...
The most important mineral component of Lapis Lazuli is lazurite (25% to 40%), a...
Larimar, also called Dolphin Stone, is a rare blue variety of the...
Larvikite is an igneous rock, specifically a variety of monzonite, notable for the presence...
Leopardskin Jasper is a form of silicon dioxide that has many inclusions...
Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals with...
Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths...
Mad River Agate is a beautiful stone from Madagascar. It's a banded...
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock....
Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3 (OH)2. This...
Marra Mamba is extremely old, forming when the Earth was very young...
At over 2 billion years old, this subvariety of Jasper is a...
Maury Mountain agate is a particular type of moss agate which dendritic...
