AMETHYST - THIN POLISHED SLICE SHOWING COLOUR ZONING
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Polished slice with colour zoning
Part of a thin, cut and polished slice through an amethyst crystal showing colour zoning.
The zoning is a result of changes in the chemical or physical environment in which the crystal is growing. Some slices show a triangular pattern of colour zoning caused by the six sided growth of the quartz crystal.
Presented in a glass gemstone box.
Click on a picture for a larger image
Size: 6 x 6 x 2 centimetres (size of box)
Weight: 44 grams
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