Zircon

ZrSiO₄

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Zircon is the oldest mineral found on Earth, with some crystals dating back 4.4 billion years. It is an important accessory mineral in igneous rocks and a key mineral for geochronology (U-Pb dating). The gem variety comes in many colors.

晶系	Tetragonal
矿物分类	09 Silicates
莫氏硬度	6.5-7.5
比重	3.93-4.73
颜色	Colorless, yellow, brown, red, green, blue
光泽	Adamantine
条痕色	Colorless
解理	Poor {110}, {111}
断口	Conchoidal
透明度	Transparent
晶体习性	Prismatic with pyramidal terminations