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amethyst
Purple quartz is called amethyst. The colour is caused by small quantities of iron....
Date added to website:
12/12/2007
calcite
Calcite is a common mineral found in limestone rock and in most sea shells. It dissolves...
Date added to website:
12/12/2007
carnelian
Carnelian is a member of the family of quartzes known as chalcedony. It is a translucent...
Date added to website:
12/12/2007
children gem panning
Children gem panning at the National Stone Centre, Wirksworth, Derbyshire
Date added to website:
01/03/2006
citrine
Citrine is quartz coloured yellow by iron. It can occur naturally but often is made...
Date added to website:
12/12/2007
fool's gold
Iron pyrite is known as fools gold because it can be mistaken for gold. It has a...
Date added to website:
12/12/2007
Guided trail
Visitors setting off on the guided site trail at the National Stone Centre to view...
Date added to website:
28/11/2007
lapis lazuli
Lapis lazuli is made mainly of blue lazurite, mixed with calcite and pyrite. It...
Date added to website:
12/12/2007
Life under the sea 330 million...
This drawing of life under the sea 330 million years ago is based on evidence from...
Date added to website:
28/11/2007
limestone with fossils
Carboniferous Limestone often has clearly visible fossils, in this case, mainly crinoids
Date added to website:
22/11/2005
obsidian
Obsidian is a black igneous rock formed from lava that cooled very quickly forming...
Date added to website:
12/12/2007
quartz crystal
Quartz is a common mineral which is found in many rocks. Quartz crystals have a...
Date added to website:
03/12/2007
rose quartz
Pink coloured quartz is known as rose quartz. The colour is caused by small amounts...
Date added to website:
12/12/2007
tiger's eye
Tiger's eye is part of the family of quartzes known as chalcedony. It has bands...
Date added to website:
12/12/2007