Translucent Montana Agate — Yellowstone River, Seven Sisters — The Glow
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This Montana Agate pendant is cream, brown, and white. It has a translucent glowing pattern. The stone is high polish. It is set in a filigree pendant back.
We were working the bar at Seven Sisters on the Yellowstone River. Janyce was upstream from me. I heard her yell, "Wow, honey, look at this one glow in the sun." I walked over and put it in the bag.
This stone is part of The Yellowstone River Collection. We spent nine hours on the bar at Seven Sisters on July 5th. We were looking for good agate.
Stone: Montana Agate
Dimensions: 30mm by 40mm by 8.5mm
Finish: High Polish
Setting/Format: Pendant, Bezel Setting - Ready to Wear, Filigree pendant back
Includes: Bail, Silver-tone Metal Snake Chain
One-of-a-Kind: Yes
The inclusions sparkle. It feels like a Victorian treasure.
— Bob and Janyce, Rockhound Studio, Spokane Valley WA
The Yellowstone River Collection
- Dimensions: 30mm by 40mm by 8.5mm mm
- Surface finish: High Polish
- Origin: Yellowstone River, Seven Sisters
Geological details
- Mohs hardness: 6.5–7
- Crystal system: Trigonal — microcrystalline (banded)
- Mineral class: Silicates — Tectosilicates (Chalcedony group)
- Geological era: Variable
- Rock composition:
- Obsidian
- Rock formation: Volcanic vesicle fills — basalt and rhyolite
- Cleavage: None
- Fracture: Conchoidal
- Luster: Waxy
- Specific gravity: 2.58–2.64
- Diaphaneity: Translucent to opaque
From the bench
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