GYPSUM/ANHYDRITE DRILL CORE - Leicestershire
« backVINTAGE (1971) SECTION OF GYPSUM/ANHYDRITE DRILL CORE
East Leake Gypsum Mine, Leicestershire
A core sample is a cylindrical section of rock obtained by drilling with a special drill with a hollow steel tube called a core drill. They are obtained to test the properties of rock in advance of mining or quarrying.
This section has a scratch mark down the length of the core from six inch nail. This was the standard test to distinguish between gypsum (hardness 2) and anhydrite (hardness 3-3.5).
An unusual item! Presented in a vintage museum display box with a glass lid.
Click on a picture for a larger image
Size: approx. 9 centimetres long and 3 centimetres diameter
Weight: 165 grams
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