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Quartz(RockCrystal)
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Quartz (variety Rock Crystal) Si O2 Crystallography:
Hexagonal -R; 32 (low-quartz). Hexagonal; 622 (high quartz). Crystals commonly prismatic, with prism faces horizontally striated and usually terminated by p...
Cinnabar
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Cinnabar HgS Crystallography:
Hexagonal-R; 32 (low temperature form). Crystals usually rhombohedral, often in penetration twins. Commonly fine granular, massive; also earthy.
Physical Properties: Cleavage: {10...
EyeProtectionScienceOlympiad-FINAL 7-29-15
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EyeProtectionScienceOlympiad-FINAL 7-29-15
Science Olympiad Eye Protection Policy Updated July 29, 2015
Purpose: This policy provides details regarding EYE PROTECTION in those events where an Event Rule requires Eye Protection. The objective is to...
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