Product Description
These 25mm x 50mm unglazed porcelain tiles are ideal for streak testing of minerals. The streak test is essential in mineral identification because it retains the colour of the mineral.
£7.61
PK10
These 25mm x 50mm unglazed porcelain tiles are ideal for streak testing of minerals. The streak test is essential in mineral identification because it retains the colour of the mineral.
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