491 results for quartz

Fancy Jasper is the colorful jasper found in Maharashtra, India. Jasper is an ornamental rock composed mostly of chalcedony, microcrystalline quartz, in association with other minerals, which give...

Colorado, like most western states, has produced gold, copper, and silver. Gold was discovered in 1859 and the most productive gold mine in Colorado, the Cresson Mine, produced more than 258,000...

What is Rock Tumbling? Rock tumbling is a fun way of polishing multiple semiprecious gemstones simultaneously in a rock tumbler. A rock tumbler is a piece of equipment that has a plastic or rubber-lin

Cherry Creek Jasper is a colorful jasper found in Mainland China. It is also known as Red Creek Jasper or Picasso Jasper. It comes from the Cherry Creek Mine and there is a nearby creek named Red...

Dendritic Agates have very thin tree-like inclusions of iron, manganese, or other metallic oxides that grow in natural fractures. These inclusions called dendrites were named after the Greek word...

  Michigan has 1,853 records of mining mines according to the U.S.G.S. Lower Mic

Sowbelly Amethyst Agate or Vein Amethyst Agate with Silver Dendrites A lovely material with the unfortunate name of Sowbelly Agate, but it is also known as Vein Amethyst or Amethyst Agate. Sowbelly...

Rhyolite is an extrusive igneous rock formed as a deposit of volcanic ash. The ash becomes rock after being exposed to extreme heat and pressure. Iron oxide stains create the beautiful patterns...

Sedimentary rocks containing coal, salt, and fossils are under Kansas. The surface is sand and gravel from the erosion of the Rocky Mountains and carried eastward by water. These deposits created...

Sagenite Agate, or Sagenitic Agate, is any agate having acicular or needle-like mineral or crystal growths. These "sagenites" usually intersect in a grid or grill-like pattern, but the hair...