Quartz Point aprox 3 x 1 Inch all natural just 5.00
Mohs hardness: 7
Refractive index: 1.544-1.553
Critical angle: 40°
Specific gravity: 2.63-2.65
Cleavage: None
Fracture: Conchoidal, brittle.
Dispersion: Medium (.013)
Heat sensitivity: Low
Pleochroism: Amethyst: very weak (purple to grayish purple); Natural citrine: weak (yellow to light-yellow); Prasiolite: very weak (light-green to paler green); Rock crystal: colorless, no dichroism; Rose quartz: weak (pink to paler pink); Natural dark smoky: definite (brown to reddish-brown).
Birefringence (double refraction): Weak (.009)
http://roughandcutgems1.miiduu.com/Quartz-Point-aprox-3-x-1-Inch-all-natural
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