{"product_id":"swallowtail-calcite-anhui-province-china","title":"Swallowtail Calcite, Anhui Province, China","description":"\u003cp dir=\"ltr\"\u003eThis specimen shows a dramatic swallowtail calcite twin, with long, blade-like crystal wings fanning outward from a dense cluster base in a striking wing-like formation. The crystals are translucent with soft champagne-to-charcoal tones, and a scatter of dark, sparkly inclusions at the base adds nice textural contrast against the pale, glassy blades. \u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eSwallowtail calcite twins are a hallmark of Tongling, Anhui Province, China, one of the world's best-known localities for this striking growth form. The twinning occurs when calcite crystals grow together at a specific angle, producing the elongated, wing-like blades that give the variety its name; a formation prized by collectors for its sculptural, almost architectural appearance.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eDetails:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eMineral: Calcite (swallowtail twin)\u003c\/li\u003e\n\u003cli\u003eLocality: Tongling, Anhui Province, China\u003c\/li\u003e\n\u003cli\u003eSize: 5 x 4.5 x 2.5 in, 366g\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCondition: Natural, undamaged twin formation\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Atelier Lithic","offers":[{"title":"Default Title","offer_id":50522634256596,"sku":null,"price":389.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9021\/0260\/files\/6C31A194-AB29-4889-B400-A8F5ECF356D1_1_105_c.jpg?v=1790136338","url":"https:\/\/www.atelierlithic.com\/products\/swallowtail-calcite-anhui-province-china","provider":"Atelier Lithic","version":"1.0","type":"link"}