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Aug 04, 2012 · The mineral has rough and irregular surfaces Uneven 3. 4 The mineral has rough and jagged edges Hackly 5. 6 The mineral has smooth, curved surfaces Conchoidal Station #7 Gems. Gemstones are rocks and minerals that are prized for their beauty, durability, and rarity. In the Gem Minerals Collection box, there are 15 samples of gemstones. ................
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