Where is Pyrite in Quartz found?

Pyrite in Quartz occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.

Where to find Pyrite in Quartz

Collecting tips

1. Look for Hydrothermal Veins. Pyrite in quartz is commonly found in quartz veins that cut through other rock types, especially in areas with a history of hydrothermal activity and mineralization.
2. Examine Mine Dumps and Tailings. Old mine dumps from gold, copper, or lead-zinc operations are excellent places to find specimens, as pyrite is a common accessory mineral in these deposits.
3. Check for Associated Minerals. Pyrite in quartz often co-occurs with other sulfide minerals (e.g., chalcopyrite, galena, sphalerite) and sometimes native gold. The presence of these can indicate a promising area.
4. Use a Hand Lens. Small pyrite crystals embedded in quartz can be easily overlooked without magnification. A hand lens (10x) is invaluable for identification.
5. Test Hardness and Streak. Pyrite has a Mohs hardness of 6-6.5 and a greenish-black streak, distinguishing it from native gold (softer, yellow streak) and chalcopyrite (softer, greenish-black streak). Quartz has a hardness of 7 and no streak.

Quick Check

Color:

Brassy yellow metallic inclusions in colorless to white/gray glassy matrix.

Luster:

Metallic (pyrite) and Vitreous (quartz).

Streak:

Greenish-black (pyrite); none (quartz).

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