- - Rock cavity lined with crystals
- - Hollow rock with crystals inside
- - Rock with a crystalline interior
- - Hollow rock containing crystals
- - Rock collector's prize
- - Rock similar to a thunder egg
- - Rock with a sparkling center
- - Rock that's often cut open
- - Rock that's often cut in half
- - Hollow crystal lined stone
- - Show-and-tell rock
- - Quartz-filled rock
- - Fancy rock
- - Crystallic rock
- - Sparkling rock
- - Crystal-containing rock
- - Crystal-filled rock
- - Crystal-filled cavity
- - Crystal-lined rock
- - Crystal-filled formation
- - Crystal-lined stone
- - Rock with a crystal cavity
- - Hollow stone
- - Crystal-filled nodule
- - Hollow rock
- - Rock with a hollow cavity
- - Crystal-bearing rock
- - Crystal-centered rock
- - Glittery rock
- - Rock with a cavity of crystals
- - Rock containing crystals
- - Rock containing crystal
- - Crystal-lined cavity
- - Crystal rock
- - Crystal-filled natural wonder
- - Sparkly rock
- - Iowa's state rock
- - Hollow rock with crystals
- - Rock with a glittery inside
- - Crystal Cave is one
- - Crystal-filled stone
- - Shiny, hollow paperweight
- - It has a crystal inside
- - Rock that's glittery inside
- - Rock with a crystal inside
- - Hollow, crystal-filled rock
- - Crystal-center rock
- - Where to look for crystals
- - Keeper for a rock collector
- - Rock that glitters inside
- - Crystalline rock
- - Rock filled with sparkles
- - Crystal ball?
- - Hollow, crystal-containing rock
- - Hollow crystalline rock
- - Stone nodule often containing crystal
- - Rock-shop curiosity
- - Hollow stone, often crystal-filled
- - Crystal container
- - Crystal-lined nodule
- - Hollow crystallized rock
- - Hollow nodular stone
- - Stone lined with crystals
- - Mineral-containing stone
- - Crystal-bearing nodule of stone
- - Rock cavity
- - Rock with crystal center
- - Stone with crystals
- - Stone often lined with crystals.
- - Stone with crystal-lined cavity.
- - Stone containing crystals.
- - Crystal-lined rock cavity.
- - Stone with a crystal-lined cavity.
- - Stone nodule with crystal-lined cavity.
- - Rock with a sparkling middle
- - Rock formation?
- - rock lined with crystals
- - Highlight of a rock collection
- - One is beautiful on the inside
- - it's pretty on the inside
- - crystalline collectible
- - Round stone
- - Thunder egg
- - Stone cavity
- - One looks prettier when broken open
- - Crystalline stone
- - Sparkling paperweight
- - Rocky sparkler
- - Amethyst source
- - Rockhound's find
- - Glittery stone
- - Piece in a rockhound's collection
- - Quartz repository
- - It may be lined with quartz
- - All-natural sparkler
- - Sparkly paperweight
- - Natural sparkler
- - New Age stone
- - Sparkler
- - Crystallized stone
- - Nodule of stone
- - Collector's stone
- - Sparkly collectible
- - Globular stone
- - A nodule of stone
- - Stone formation.
- - Stone nodule.
- - Sparkly stone
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- [ Other definitions ]