Metallic Would Be Best Described as Which Mineral Property

Occurs in pegmatites and high-temperature quartz veins also in cavities in granites and rhyolites. This physical property is controlled by the chemical composition and structure of the mineral.

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The Mohs Hardness Scale which is used by most mineral collectors is based on the hardness of other minerals.

. This is defined by ten minerals where each mineral can scratch those with a lower scale number. Fracture is described as the way a mineral breaks not along a cleavage plane. Hardness is commonly measured on the Mohs scale.

Diamond hardness 10 can scratch everything below it on the Mohs scale but cannot itself be scratched whereas quartz. It is on a scale of one to ten ten being the hardest. A pure synthetic OH analogue of topaz has been.

A maximum of 30 of the F site is occupied by OH in natural topaz although in some very rare cases OH-dominant members have been described in high-pressure rocks see Unnamed OH-analogue of Topaz Zhang et al 2002. It can be uneven hackly sharp jagged surface like broken metal splintery or conchoidal shell-like.

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