“Glowstones” – a mineral which exhibits triboluminescence

When the two stones are rubbed together in a darkened room, a white light is visible at the point of contact. The effect is known as triboluminescence. The stone is most commonly known as white-veined or milky quartz. The product was supplied by Tobar Ltd, Harleston, IP20 0PJ, England.

Details

Size The shrink wrapped blue card is 105 x 115mm.
Date Circa 2000
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Category
Ref no N2422