Sardonyx is a variety of onyx which is typically "striped" and can have the appearance of the "rings" of a sawn tree-trunk, as can be seen in the topmost image. Sardonyx differs from regular onyx in that the dark bands are red or reddish brown, instead of black. The red bands are layers of sard, hence the name. It has similar general properties to onyx.
Crystals, Gemstones, Precious Stones, Sardonyx, Rocks Hound, Band Agates, Rocks And Minerals In Kentucky, U.S. States, Agates Band
a slice of sardonyx "The foundations of the city walls were decorated with every kind of precious stone. The first foundation was jasper, the second sapphire, the third chalcedony, the fourth emerald, the fifth sardonyx, ..." Revelation 21:1920
Rough slab of red banded agate (aka Sardonyx).
Agate banded 750pix.jpg
Mexican Crazy Lace Agate
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Mexican Lace Agate
crazy lace agate cabochon
Lake Superior Agate (red laker gem)
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State rock- Lake Superior Agate
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Sliver of Teepee Canyon agate ~ Captain Tenneal Agates are semi-precious gemstones that are a variegated form of chalcedony (pronounced kal-sed'-nee), which is silicon dioxide in the form of microscopic fibrous quartz crystals. Agates naturally develop when an empty pocket inside a host rock fills in molecule-by-molecule, layer-by-layer as these microcrystals self organize to form concentric bands or other patterns. The colors and arrangement of the microcrystals are influenced by changes in pressure, temperature, and mineral content that occur during the formation process. Unlike other gemstones, each agate is unique. Even slabs cut from the same specimen will vary in color and design.
leave it to mother nature.. these colors and patterns are amazing
Colorful marbled agate
Textures. students draw different textures, inspired by: drift wood, rocks, leaves, glass, thorns, etc. creating designs and rhythmic patterns. Great fun exercise.
Laguna lace agate
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Laguna lace agate cab. Silverhawk's designer gemstones.
Laguna lace agate #crystal
Turritella Agate (Wyoming)
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Turritella Agate (Wyoming). Looks like sea shells fossilized which only proves that once upon a time, Wyoming was under water.
Turritella agate cabochon - 102 carats - Silverhawk - http://www.samsilverhawk.com/2011gemstones/417cabs/tur.html
TURRITELLA agate designer cab Silverhawk's designer gemstones.
Turritella Agate (Wyoming) Fossil Cabochon
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WA Sumatran Agate | Flickr - Photo Sharing!
Sumatran Agate: Mother Nature is a brilliant artist!
"Sumatran Agate- did my research and this beautiful rock colored in detail is from Indonesia"
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Agata / South Dakota
Cut and polished nodule found out on the prairie. | Flickr - Photo Sharing!
Laguna Agate / Chihuahua, Mexico
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crazy lace agate
Puma Agate geode
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puma agate geode
Puma Agate: grounding stone that enhances mental functions and promotes intellectual, emotional, and physical balance.
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Banded Agate ~
by Bill The Eggman,- photo stream= https://www.flickr.com/photos/bill_the_eggman/
Color Theory Therapy| Agate
Fairburn Agate - 2 pieces found separately made 1 perfect piece. Captain Tenneal's photograph.