Banksy, Haring and Warhol auction 2: April 30 live auction.

Black Moonstone is a variety of Moonstone, obtained from Madagascar. The black moonstone is the rarest of all moonstones such as the rainbow moonsto

Kambaba jasper is unique, green rhyolitic (volcanic) stone found in the west-central Bongolava region of Madagascar.

Carnelian is formed from the intergrowth of two silica minerals with differing crystal structures: quartz and moganite.

Signature of the 30th US President, mounted, framed and supplied with coa. Bio: Calvin Coolidge was the 30th president of the United States from 19

Named after the famous mythical wizard of Arthurian times!

A rare crystal. Found on the north west coast of the world's fourth largest island, the original material is now completely mined out.

Apatite is a group of phosphate minerals, usually hydroxyapatite, fluorapatite and chlorapatite.

An autograph from former Beatle Beatle - Ringo Starr. Mounted and framed. Supplied with coa. Ringo Starr first rose to fame in the early 1960s as

Red Jasper is a member of the Chalcedony mineral class. It is an opaque version of quartz with a vitreous luster and opaque transparency.

Amazonite, also known as Amazonstone, is a green tectosilicate mineral, a variety of the potassium feldspar called microcline.