Where is Fluorite on matrix found?
Fluorite (CaF2) with host rock
Got a photo? Identify rocks instantly with the Rockby app
Open the appFluorite on matrix 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 Fluorite on matrix
Cave-in-Rock District, Illinois, USA
Famous for large, well-formed, often blue and purple fluorite crystals, frequently found on limestone or quartz matrix, associated with lead-zinc deposits.
Weardale, County Durham, England
Renowned for vibrant green and purple fluorite, often with excellent clarity and cubic habit, commonly found on quartz or barite matrix in hydrothermal veins.
Naica Mine, Chihuahua, Mexico
Known for large, often purple and green fluorite crystals, frequently associated with gypsum and other sulfide minerals on a variety of matrix rocks.
Huanggang Mine, Inner Mongolia, China
Produces stunning pink, purple, and green fluorite crystals, often in complex habits, found on quartz, calcite, or sulfide matrices.
Erongo Mountains, Namibia
Source of beautiful green, blue, and purple fluorite, often associated with quartz and feldspar in pegmatitic environments.
Collecting tips
- Research Local Geology. Investigate geological maps and reports for areas known to have hydrothermal vein deposits, especially those associated with lead, zinc, or tin mineralization, as fluorite is a common gangue mineral in these settings. Sedimentary basins with evidence of diagenetic mineralization can also be productive.
- Look for Mine Dumps and Tailings. Abandoned mine dumps from historical fluorite or associated metal mining operations are excellent places to search for specimens. Always obtain permission before entering private property or mining claims.
- Examine Outcrops and Road Cuts. In areas with known fluorite occurrences, carefully inspect exposed rock faces, particularly those showing evidence of veining, alteration, or mineralization. Look for characteristic crystal forms and colors.
- Check for UV Fluorescence. Many fluorite specimens exhibit fluorescence under ultraviolet (UV) light, typically glowing blue, green, or purple. A portable UV lamp can be a useful tool for identification in the field, especially in low light conditions.
Quick Check
- Color:
- Extremely variable (purple, blue, green, yellow, colorless, etc.), often zoned.
- Luster:
- Vitreous (glassy) for fluorite.
- Streak:
- White
Explore Fluorite on matrix
Identify rocks anywhere
Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.