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top 50Memorize these and recognize 27.6% of all Geology clues.
Sample Clues
April is said to be cruel, but it also be expensive as the pink star version of this birthstone sold for $71.2 million in 2017
a diamond
One of the gems for December, it's been mined a Cerillos, New Mexico for over 1,000 years
Turquoise
The astronomer carefully adjusted the top azimuth of his telescope made of this
the topaz
The waters of the Persian Gulf are an important source of this gem
the pearl
Princess Stephanie of Monaco was born to the purple, so it's fitting that this is her birthstone
the amethyst
Sub-Areas
Other
529
Chemistry / Elements
384
Earth Science
334
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175
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66
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61
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31