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
鉱物分類	09 Silicates
モース硬度	6.5-7.5
比重	3.93-4.73
色	Colorless, yellow, brown, red, green, blue
光沢	Adamantine
条痕色	Colorless
劈開	Poor {110}, {111}
断口	Conchoidal
透明度	Transparent
結晶習性	Prismatic with pyramidal terminations