Smoky Quartz

Brown-to-black quartz colored by aluminum color centers + natural irradiation.

Full mineralogical data

Smoky quartz is a named variety, not a separate species. For complete data on chemistry, crystal system, hardness, optics, paragenesis, treatments, and inclusions — refer to the parent species:

Browse related references

• All named varieties index
• Color cause taxonomy
• Gem treatments & disclosure
• Characteristic inclusions
• Encyclopedia hub