Gemmology
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Rose quartz

Two varieties of quartz are called rose quartz. One is found in translucent masses made of intergrown anhedral crystals. It is always showing a hazy to translucent character due to microscopic fibrous inclusions of a pink borosilicate mineral related to dumortierite. The other variety occurs in well-formed crystals of similar colour. The colour is apparently caused by irradiation-induced colour centres based on Al and P, that replace Si in the atom lattice.

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Material from ‘Repository’

16 specimens: 0233 — 4.06 ct, Brazil; 0079 — 4.31 ct, Brazil; 0279 — 1.29 ct, no precise locality [Africa]; 0700 — 6.83 ct, Brazil; 0078 — 5.42 ct, Brazil; 0377 — 1.39 ct, no precise locality [Africa]; 0257 — 2.13 ct, no precise locality [Africa]; 0266 — 2.18 ct, no precise locality [Africa]; 0271 — 1.73 ct, no precise locality [Africa]; 0346 — 1.73 ct, no precise locality [Africa]; 0698 — 1.44 ct, no precise locality [Africa]; 0699 — 0.74 ct, no precise locality [Africa]; 0701 — 1.78 ct, no precise locality [Africa]; 0175 — 2.41 ct, no precise locality [Africa]; 0188 — 3.81 ct, no precise locality [Africa]; 0242 — 0.93 ct, no precise locality [Africa].


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