



Breccia Aventurine - Yakima Canyon - The Black Lightning
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This Breccia Aventurine is green-grey. It has a grey pattern with dark veining and deep green. Janyce gave it a high polish. The dark veining reads almost black. In the right light, it shows a deep, cold green. This is a one-of-a-kind piece.
Janyce and I had been searching for miles. We were coming up empty. Locals pointed us to the Yakima River Canyon. We wanted the jasper. We burned west on I-90 from Spokane. It was a drought year, and the water was low. We spent the afternoon wading in foot-deep water. We hauled 40 lbs of stone out of that canyon.
This piece came from that water. It is part of our Yakima River Canyon collection.
Stone: Breccia Aventurine
Dimensions: 19x12x8.5 mm
Weight: 11.0 g
Finish: High Polish
Setting/Format: Pendant with Silver Plated Pinch Bail
Includes: Silver Plated Snake Chain
Character: Multiple shapes and lines in the pattern spoke to me.
— Bob and Janyce, Rockhound Studio, Spokane Valley WA
Chert Road Detour Story
Yakima River Canyon Collection
- Dimensions: 19x12x8.5 mm mm
- Stone weight: 11.0 g
- Surface finish: High Polish
- Origin: Yakima River Canyon
Geological details
- Mohs hardness: 6.5-7
- Crystal system: Trigonal
- Mineral class: Silicates
- Geological era: Precambrian
- Rock composition:
- Obsidian
- Rock formation: Metamorphic
- Cleavage: None
- Fracture: Uneven to Conchoidal
- Luster: Vitreous to Glistening
- Specific gravity: 2.64-2.69
- Diaphaneity: Translucent to Opaque
From the bench
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