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[Subject: Mineralogy]
- Zirconium silicate, which gems are made of high refractive index, but without sufficient strength
Translated by: ISAAC SMITH
Translated in 12 languages
- a brown to colorless mineral which is heated, cut, and polished to form a brilliant blue-white gem Formula: ZrSiO4
Translated in 7 languages
[Subject: Geology, Meteorology, Hydrology]
Translated in 1 languages