Where is Hematoid Quartz found?
SiO2 with Fe2O3
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Open the appHematoid 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 Hematoid Quartz
Brazil
Minas Gerais is a significant source, producing large, well-formed crystals with vibrant hematite inclusions.
Madagascar
Known for producing high-quality hematoid quartz, often with distinct red and orange hues.
United States
Various localities, including Arizona and Arkansas, yield quartz with iron oxide staining and inclusions.
South Africa
Produces specimens with strong red coloration due to hematite.
China
Several regions produce quartz with hematite, often with interesting phantom formations.
Collecting tips
- Look for Hydrothermal Veins. Explore areas with quartz veins, especially those associated with iron-rich host rocks or mineralized zones.
- Examine Sedimentary Formations. Check for quartz crystals in iron-rich sedimentary environments, such as those near banded iron formations or red beds.
- Identify Iron Staining. Look for reddish-brown staining on rocks and in soil, which can indicate the presence of iron oxides and potentially hematoid quartz.
- Check for Crystal Habits. Search for characteristic hexagonal quartz crystals, which may contain visible hematite inclusions or coatings.
Quick Check
- Color:
- Yellow, orange, red, reddish-brown
- Luster:
- Vitreous to sub-metallic/metallic
- Streak:
- White (for quartz), reddish-brown (if hematite is rubbed directly)
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