





Breccia Aventurine — Yakima River Canyon — The Dark Horse
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This is a deep black jasper. It shows grey-white veining. Janyce gave it a high polish.
Before Yakima, we had driven many miles. We were not finding much. Locals pointed us to the Yakima River Canyon. Everyone else wanted Ellensburg Blue. We wanted the jasper.
We hauled 40 pounds of stone from that canyon. Not one piece went into the front yard rock garden. Every piece in this Yakima River Canyon collection came out of that water.
Stone: Breccia Aventurine
Dimensions: 19x12x8.5 mm
Weight: 14.0 g
Finish: High Polish
Setting/Format: Loose Stone
Includes: Loose stone, undrilled
One-of-a-Kind: Yes
This striking black jasper statement piece was discovered in Yakima Canyon.
This loose stone measures 19x12x8.5 mm. It is ready for your setting.
— Bob and Janyce, Rockhound Studio, Spokane Valley WA
Chert Road Detour Story
Yakima River Canyon Collection
- Dimensions: 19x12x8.5 mm mm
- Stone weight: 14.0 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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