Crystals
Mookaite jasper
Locality-defined ornamental rock Silicified porcellanite in Windalia Radiolarite Late Early Cretaceous marine origin Dominant material: SiO2-rich aggregate Mohs approximately 6.5–7 in dense zones Cream, mustard, burgundy, plum, and mauve Mookaite:...
Mookaite jasper
Locality-defined ornamental rock Silicified porcellanite in Windalia Radiolarite Late Early Cretaceous marine origin Dominant material: SiO2-rich aggregate Mohs approximately 6.5–7 in dense zones Cream, mustard, burgundy, plum, and mauve Mookaite:...
Oceanic jasper
Locality-defined orbicular siliceous rock Spherulitic chalcedony and silicified volcanic host Quartz, chalcedony, agate, and drusy cavities Mohs approximately 6.5–7 Concentric orbs, halos, ribbons, and crystal pockets Marovato and Kabamby, Sofia...
Oceanic jasper
Locality-defined orbicular siliceous rock Spherulitic chalcedony and silicified volcanic host Quartz, chalcedony, agate, and drusy cavities Mohs approximately 6.5–7 Concentric orbs, halos, ribbons, and crystal pockets Marovato and Kabamby, Sofia...
Picasso jasper
Trade-named patterned carbonate stone More precisely Picasso Marble or Picasso Stone Fine-grained marble and limestone Dark manganese- and iron-bearing linework Carbonate matrix approximately Mohs 3–4 Classic association with southwestern Utah...
Picasso jasper
Trade-named patterned carbonate stone More precisely Picasso Marble or Picasso Stone Fine-grained marble and limestone Dark manganese- and iron-bearing linework Carbonate matrix approximately Mohs 3–4 Classic association with southwestern Utah...
Picture jasper
Descriptive category of scenic jasper Opaque microcrystalline silica-rich stone Layering, dendrites, veins, and oxide fronts Cream, blue-gray, tan, ochre, rust, and black Mohs approximately 6.5–7 Strong Pacific Northwest lapidary tradition...
Picture jasper
Descriptive category of scenic jasper Opaque microcrystalline silica-rich stone Layering, dendrites, veins, and oxide fronts Cream, blue-gray, tan, ochre, rust, and black Mohs approximately 6.5–7 Strong Pacific Northwest lapidary tradition...
Blue quartz
Blue variety of quartz SiO2 Trigonal crystal system Mohs 7 No true cleavage Color commonly produced by fine inclusions Dumortierite and amphibole-bearing material Crystals, massive quartz, quartzite, and polished forms...
Blue quartz
Blue variety of quartz SiO2 Trigonal crystal system Mohs 7 No true cleavage Color commonly produced by fine inclusions Dumortierite and amphibole-bearing material Crystals, massive quartz, quartzite, and polished forms...
Blue calcite
Blue variety of calcite CaCO3 Trigonal crystal system Mohs 3 Perfect rhombohedral cleavage Exceptionally strong double refraction Cloudy to translucent blue masses Banded calcite–aragonite material Blue Calcite: Soft Blue Color,...
Blue calcite
Blue variety of calcite CaCO3 Trigonal crystal system Mohs 3 Perfect rhombohedral cleavage Exceptionally strong double refraction Cloudy to translucent blue masses Banded calcite–aragonite material Blue Calcite: Soft Blue Color,...