Gilalite is found in quartz cut into "gilalite quartz" cabochons.
To learn more about the mineralogy of Gilalite, see Mindat.org->
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Gilalite
- Translations : Gilalit, Gilalita
- Etymology : From the name of the typical locality: Gila County, Christmas Mine, Arizona, USA.
- Discovery: 1980 by Cesbron et Williams
Gemological data
- Chemical formula : Cu5Si6O17 · 7H2O
- Hardness (Mohs) : 2
- Density : 2.72
- Refractive index : nα = 1.560 nβ = 1.635 nγ = 1.635
- Birefingence : 0.075
- Crystal system : Monoclinic
- Group : Silicates
