








Thunderegg Agate Freeform — Irv's Rock & Jewelry — Pirate's Cove
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I bought this at Irv's. It was my first freeform. The Shopped Rock → I didn't want to cut a cab. I wanted to know what the inside of a thunderegg actually looked like. So I ground down the crust and kept going.
When I hit that topaz blue, I stopped. Islands started appearing — dark, outlined in gold, floating in a pale blue sea. There's a beacon on the top. A cloud that turned into a cartoon ghost. The whole thing is shaped like a pirate's hat and it's full of little islands. It named itself. Same day, same shop — we left Irv's with two agates. The Thunder Agate Heart → The Shopped Rock Collection →
This is a display piece. It sits on its own. No setting, no bail, no cord. Just the stone and what I found inside it.
Not dyed. Not enhanced. One of a kind.
The Stone
Type: Thunderegg Agate
Origin: Irv's Rock & Jewelry, Spokane Valley WA
Shape: Freeform Display Piece
Dimensions: 45 x 36 x 25 mm
Finish: High Polish
Mohs: 6.5–7
One of a Kind: Yes
Display Piece
Freestanding. Unmounted. Ready to sit on your shelf and start a conversation.
— Bob & Janyce, Rockhound Studio, Spokane Valley WA
- Dimensions: 19x12x8.5 mm mm
- Surface finish: High Polish
- Origin: Irv's Rock & Jewelry
Geological details
- Crystal system: Trigonal
- Mineral class: Silicates
- Geological era: Mesozoic
- Rock composition:
- Conglomerate
- Rock formation: Sedimentary
- Cleavage: None
- Fracture: Conchoidal
- Luster: Waxy
- Specific gravity: 2.20–2.70
- Diaphaneity: Opaque
From the bench
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