Stones without interlocking crystals (e.g., sandstone) break along grain boundaries and produce ‘sand’ while grinding, an unfavorable characteristic according to interviewed Tigrayan consultants ...

The sandstone rocks of Arizona were, on that day of impact 50,000 years ago, pushed beyond their limits and momentarily – for the first few trillionths and billionths of a second – transformed ...

Sarsens, the massive boulders that make up part of Stonehenge, contain interlocking quartz crystals. Those crystals — some of which are 1 to 1.6 billion years old — make the rock very durable.

Books Received Published: 08 August 1925 Crystals and the Fine-Structure of Matter Nature 116, 204–205 (1925) Cite this article ...