{"product_id":"mariposa-butterfly-calcite","title":"Mariposa \"Butterfly\" Calcite Twin - Santa Eulalia, Chihuahua, Mexico - (2.3kg)","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003eA rare geometric phenomenon from the heart of Chihuahua. This 2.3kg cabinet specimen is defined by its 'Mariposa' (Butterfly) twinning—a sophisticated mineralogical habit where two crystals grow in symmetrical, mirrored opposition. This isn't just a Calcite; it is a masterclass in twinning laws that occurred under highly specific geological conditions at the Buena Tierra Mine. We selected this piece for its balanced 'wingspan' and the way the Hematite matrix provides a rugged, organic contrast to the sharp, translucent crystal edges. For the serious collector, a Mariposa twin is the definitive representative of the Santa Eulalia District.\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003eSPECIMEN DETAILS\u003cbr\u003e\u003c\/b\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eThe \"Twin\" Habit:\u003c\/b\u003e This specimen displays classic contact twinning. Unlike standard clusters, these crystals grew in a synchronized mirrored orientation, creating the iconic \"butterfly\" silhouette.\u003cbr\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eDimensions:\u003c\/b\u003e 19.1 x 13.9 x 11.4 cm (7.5 x 5.5 x 4.5 inches).\u003cbr\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eWeight:\u003c\/b\u003e 2.3 kg (5.2 lbs).\u003cbr\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eComposition:\u003c\/b\u003e Translucent Calcite on a Ferruginous (Hematite) matrix.\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca href=\"https:\/\/www.mindat.org\/gl\/8958\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003eBuena Tierra Mine, Francisco Portillo, West Camp, Santa Eulalia District, Chihuahua, Mexico\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cem\u003eAll Gatsby Gems specimens are hand-selected for scientific accuracy and aesthetic brilliance. This specimen include a locality label and will be professionally packaged to protect its delicate 'winged' terminations.\u003c\/em\u003e\u003c\/p\u003e","brand":"Gatsby Gems","offers":[{"title":"Default Title","offer_id":53035024613651,"sku":"GG-MIN-10","price":329.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/0611\/0227\/files\/4E3A2F9A-506D-499F-9D15-BA96B90E1DB2.png?v=1769050405","url":"https:\/\/gatsbygems.com\/products\/mariposa-butterfly-calcite","provider":"Gatsby Gems","version":"1.0","type":"link"}