Perfect for beginners with simple, common vocabulary
Hidden Treasures of Rare Gemstones
Moderate difficulty suitable for most players
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Across
- 1. One of the rarest minerals, first found in Sri Lanka
- 4. Primary ore of zinc with brilliant resinous luster
- 11. Brownish mineral named for its axe-shaped crystals
Down
- 2. Gem that includes the rare cat’s eye variety
- 3. Known for its color change and pleochroism
- 5. Color-changing gemstone prized in fine jewelry
- 6. Black polycrystalline diamond found mainly in Brazil
- 7. Extremely rare gemstone sometimes mistaken for spinel
- 8. Pink to red mineral used as an ornamental stone
- 9. California’s official rare blue gemstone
- 10. Blue mineral used in refractory and ceramic products
- 12. Ancient mineral often confused with diamond due to brilliance
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