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Where is Green Obsidian found?

Volcanic Glass (Obsidian)

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Green Obsidian 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 Green Obsidian

Oregon, USA

Known for various obsidian types, including some green varieties, particularly in areas like Glass Buttes.

California, USA

Localities such as Glass Mountain and other volcanic regions can yield green obsidian.

Mexico

Certain volcanic regions in Mexico are known to produce various colors of obsidian, including green.

Indonesia

Some volcanic islands may host deposits of green obsidian.

Ethiopia

Volcanic areas in the East African Rift Valley can contain obsidian, with green varieties possible.

Collecting tips

  1. Look in Volcanic Regions. Focus your search on areas with recent or geologically young rhyolitic volcanic activity. Obsidian forms from rapidly cooled lava.
  2. Identify Lava Flows and Domes. Obsidian is typically found at the margins of lava flows, in volcanic domes, or as fragments in pyroclastic deposits near silicic volcanoes.
  3. Check for Glassy Texture. Obsidian's distinct glassy luster and conchoidal fracture are key identifiers. Look for sharp, curved edges.
  4. Examine Color and Translucency. While black is most common, hold pieces up to light to check for green hues, especially in thinner fragments or edges. Some green obsidian can be quite dark and only reveal its color when backlit.
  5. Safety Precautions. Obsidian fragments are extremely sharp. Always wear sturdy gloves and eye protection when handling or collecting. Be aware of unstable terrain in volcanic areas.

Quick Check

Color:
Dark green to olive green, sometimes translucent emerald green.
Luster:
Vitreous (glassy).
Streak:
White (as it is a glass, it will scratch the streak plate rather than leave a colored powder).

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