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Ammonites ruled the Oceans for 370 million years before mysteriously becoming extinct at the end of ..
Aragonite has the same chemical composition as Calcite but a totally different form (it is dimorphou..
Agate is a very fine grained form of Quartz. It grows within volcanic lava bubbles known as geodes. ..
Jasper a form of chalcedony and is an opaque rock of virtually any colour stemming from the mineral ..
Moonstone is a pearly/opalescent variety of the mineral Orthoclase. Long popular as a semi precious ..
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced..
Onyx is a cryptocrystalline form of quartz. The colours of its bands range from white to almost ever..
Tiger's eye (also called Tigers eye or Tiger eye) is a chatoyant gemstone that is usually a metamorp..
Aventurine is a form of quartz characterised by its translucency and the presence of platy mineral i..
Amethyst is a lilac to purple variety of the mineral Quartz. It forms beautiful crystals inside volc..
Sodalite is a rich royal blue sodium aluminium silicate mineral widely enjoyed as an ornamental ston..
Rhodonite is a member of the pyroxene group of minerals Rose red in colour Rhodonite can also exhibi..
Rose Quartz is a beautiful pink variety of the mineral Quartz. The colour is thought to be due to tr..
Carnelian (or cornelian) is a reddish-brown mineral which is a variety of the silica mineral chalced..
The tourmaline mineral group is chemically one of the most complicated groups of silicate minerals. ..
Calcite is Calcium Carbonate and occurs in almost every environment worldwide. It occurs in a vibran..
There is a misconception that Garnets are only a red gem but in fact they come in a variety of colou..
Goniatites are extinct ammonoids shelled cephalopods related to squid octopus and belemnites. The go..
Pyrite or Iron Pyrites is Iron Sulphide also known to many as Fools Gold. In renaissance times hundr..
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