{"title":"Chalcedony","description":"\u003cp\u003e\u003cstrong\u003eChalcedony\u003c\/strong\u003e is a cryptocrystalline variety of \u003cstrong\u003equartz\u003c\/strong\u003e, formed of microscopic fibrous crystals intergrown with minor \u003cstrong\u003emoganite\u003c\/strong\u003e, giving it a waxy luster and translucent to semi-transparent appearance. Colorless, white, gray, or blue in its purest form, it becomes an entire family of gem varieties once color and pattern enter the picture: banded \u003cstrong\u003eagate\u003c\/strong\u003e, red \u003cstrong\u003ecarnelian\u003c\/strong\u003e, brown \u003cstrong\u003esard\u003c\/strong\u003e, apple-green \u003cstrong\u003echrysoprase\u003c\/strong\u003e, dendritic \u003cstrong\u003emoss agate\u003c\/strong\u003e, blood-spotted \u003cstrong\u003eheliotrope\u003c\/strong\u003e, black-and-white \u003cstrong\u003eonyx\u003c\/strong\u003e, and silica-replaced \u003cstrong\u003epetrified wood\u003c\/strong\u003e all fall under this single mineralogical umbrella.\u003c\/p\u003e\u003cp\u003eTypical occurrences are amygdaloidal cavities in basalt and volcanic lava, where silica-rich fluids slowly deposit botryoidal crusts and geode linings. Classic sourcing regions include \u003cstrong\u003eUruguay\u003c\/strong\u003e and \u003cstrong\u003eBrazil\u003c\/strong\u003e for large agate geodes, \u003cstrong\u003eNamibia\u003c\/strong\u003e and \u003cstrong\u003eNevada\u003c\/strong\u003e for fine blue chalcedony, \u003cstrong\u003eOregon\u003c\/strong\u003e for its famed thunderegg and carnelian material, and \u003cstrong\u003eSzklary\u003c\/strong\u003e in Poland alongside \u003cstrong\u003eMarlborough, Queensland\u003c\/strong\u003e in Australia for chrysoprase. Notable exceptional finds include the iridescent fire agate of the American Southwest, botryoidal carnelian from Somerset County, New Jersey, and the fully silicified logs of Arizona's Petrified Forest.\u003c\/p\u003e\u003cp\u003ePrized for hardness (7 on the Mohs scale), durability, and an almost limitless range of colors and banding patterns, chalcedony has been cut, carved, and collected since the Bronze Age. Today collectors seek it for the sheer variety within one species — from museum-grade banded agate slabs to lustrous chrysoprase cabochons and dendritic moss agate specimens showcasing nature's own miniature landscapes.\u003c\/p\u003e","products":[{"product_id":"lz-ametista-osilo-scettro-sardegna-0","title":"AMETHYST SCEPTERS – Violet Crystal Clusters on Green CHALCEDONY","description":"\u003cp\u003eNatural Amethyst from Capurru Quarry, Osilo, Sassari Province, Sardinia, Italy. Beautiful specimen featuring numerous well-formed scepter amethyst crystals with intense purple coloration and excellent natural crystallization. A highly aesthetic collector's piece from one of Italy's best-known amethyst localities.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-start=\"500\" data-end=\"517\"\u003eMineral Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"518\" data-end=\"533\"\u003eDimensions:\u003c\/strong\u003e 135 x 123 x 76 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"552\" data-end=\"563\"\u003eWeight:\u003c\/strong\u003e 986 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"570\" data-end=\"585\"\u003eProvenance:\u003c\/strong\u003e Capurru Quarry, Osilo, Sassari Province, Sardinia, Italy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITALMINERAL","offers":[{"title":"Default Title","offer_id":45414401441901,"sku":null,"price":329.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8027\/6333\/files\/IMG20260325162717.jpg?v=1782826417"},{"product_id":"lz-calcedonio-sardegna","title":"CHALCEDONY – Shiny Botryoidal Texture from Sant’Antioco, Sardinia, Italy","description":"\u003cp\u003eNatural Chalcedony from Sant’Antioco, South Sardinia, Italy. Elegant specimen featuring a smooth, compact microcrystalline structure with soft natural luster and uniform aesthetic texture. Highly refined collector piece with balanced visual appearance. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-start=\"517\" data-end=\"534\"\u003eMineral Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"535\" data-end=\"550\"\u003eDimensions:\u003c\/strong\u003e 106 x 62 x 48 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"568\" data-end=\"579\"\u003eWeight:\u003c\/strong\u003e 142 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"586\" data-end=\"601\"\u003eProvenance:\u003c\/strong\u003e Sant’Antioco, South Sardinia, Sardinia, Italy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITALMINERAL","offers":[{"title":"Default Title","offer_id":45425054875757,"sku":null,"price":65.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8027\/6333\/files\/IMG20260308215316.jpg?v=1783143721"}],"url":"https:\/\/www.italmineral.com\/collections\/chalcedony.oembed","provider":"ITALMINERAL","version":"1.0","type":"link"}