Where is Carnelian Agate found?
Chalcedony (SiO2) with iron oxide impurities
Got a photo? Identify rocks instantly with the Rockby app
Open the appCarnelian Agate 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 Carnelian Agate
India (Maharashtra, Gujarat)
Historically significant source, particularly for high-quality, deep red carnelian. Found in Deccan Trap basalts.
Brazil (Rio Grande do Sul)
Major producer of various chalcedony varieties, including carnelian, often found in geodes and amygdules within basaltic flows.
Uruguay
Known for its agate and chalcedony deposits, including carnelian, often associated with volcanic rocks.
Madagascar
Produces carnelian, often found in alluvial deposits.
United States (Oregon, Washington, California)
Various localities yield carnelian, particularly in volcanic regions and associated stream gravels.
Germany (Idar-Oberstein region)
Historically a major cutting and polishing center for agate and carnelian, with some local deposits.
Collecting tips
- Look in Volcanic Terrains. Carnelian is commonly found in areas with past volcanic activity, particularly in basaltic flows where it forms in gas vesicles.
- Check Alluvial Deposits. Riverbeds, stream gravels, and beach deposits are excellent places to find water-worn carnelian nodules, as it is durable and resistant to weathering.
- Examine Rock Cavities. When exploring volcanic rocks, look for geodes or amygdules that may contain carnelian or other chalcedony varieties.
- Observe Color and Translucency. Carnelian's distinctive reddish-orange to brownish-red color and its characteristic translucency are key identifiers. Hold specimens up to light to check for translucency.
- Test Hardness. With a Mohs hardness of 6.5-7, carnelian will scratch glass and steel, which can help differentiate it from softer look-alikes.
Quick Check
- Color:
- Reddish-orange to brownish-red
- Luster:
- Waxy to vitreous
- Streak:
- White
Explore Carnelian Agate
Identify rocks anywhere
Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.