{"product_id":"calcite-with-boulangerite-inclusions-quartz-and-tetrahedrite","title":"CALCITE with  BOULANGERITE inclusions   QUARTZ and  TETRAHEDRITE","description":"A spectacular, 9.5 x 8 cm dome of interlocked cockscomb Calcite crystals, each averaging around 1.5 cm across, coloured jet-black by very finely disseminated Boulangerite inclusions; from the Herja mine at Chiuzbaia, Baia Mare, Romania.  Boulangerite, a lead antimony sulphide, forms very fine, hair-like acicular crystals within the Calcite and, under low magnification, also manifest on the surface of the crystals as very fine filaments. A 4 cm long greyish-milky Quartz crystal stands upright at one end and clumps of dark-grey granular Tetrahedrite sit within many of the Calcite rosettes.  A lustrous and very showy specimen.  ","brand":"Crystal Classics","offers":[{"title":"Default Title","offer_id":46545164828847,"sku":"CC19567","price":2000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/8516\/2671\/files\/CC19567.png?v=1770375078","url":"https:\/\/crystalclassics.com\/products\/calcite-with-boulangerite-inclusions-quartz-and-tetrahedrite","provider":"Crystal Classics","version":"1.0","type":"link"}