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Quartz vs Calcite: A Side-by-Side Comparison for Collectors
Quartz and calcite look alike in the field, but hardness, acid reaction, cleavage and crystal shape separate them quickly. Here's how to...
How to Identify Quartz in the Field: A Beginner's Checklist
A practical field guide to confirming quartz by hand: what its lustre, hardness and fracture look like, plus a two-minute checklist and...
Exploring quartz, crystals, and mineral wonders.
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