{"id":893,"date":"2026-02-02T23:51:37","date_gmt":"2026-02-02T23:51:37","guid":{"rendered":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/?post_type=product&p=893"},"modified":"2026-02-02T23:51:38","modified_gmt":"2026-02-02T23:51:38","slug":"brazilian-quartz-points","status":"publish","type":"product","link":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/product\/brazilian-quartz-points\/","title":{"rendered":"Brazilian quartz points"},"content":{"rendered":"

Brazilian quartz points<\/strong> are naturally formed \u03b1-quartz (SiO\u2082)<\/strong> crystals exhibiting well-defined prismatic habits<\/strong> with sharp terminations. These crystals crystallize in the trigonal crystal system<\/strong>, typically forming hexagonal prisms capped by pyramidal faces.<\/p>\n

Formation and Properties<\/h4>\n
    \n
  • \n

    Chemical composition:<\/strong> SiO\u2082<\/p>\n<\/li>\n

  • \n

    Hardness:<\/strong> 7 (Mohs scale)<\/p>\n<\/li>\n

  • \n

    Luster:<\/strong> Vitreous<\/p>\n<\/li>\n

  • \n

    Transparency:<\/strong> Transparent to translucent<\/p>\n<\/li>\n

  • \n

    Cleavage:<\/strong> None; fracture:<\/strong> conchoidal<\/p>\n<\/li>\n

  • \n

    Crystals grow from silica-saturated hydrothermal fluids<\/strong> in pegmatitic or granitic environments. Variations in temperature, pressure, and fluid composition influence the clarity, size, and formation of terminations.<\/p>\n<\/li>\n<\/ul>\n

    Geological Significance<\/h4>\n
      \n
    • \n

      Quartz points from Brazil<\/strong>, particularly from Minas Gerais<\/strong>, are renowned for their large size, clarity, and well-formed terminations<\/strong>.<\/p>\n<\/li>\n

    • \n

      They represent slow, stable crystallization<\/strong> in silica-rich environments over millions of years, often recording subtle growth zoning or fluid inclusions.<\/p>\n<\/li>\n<\/ul>\n

      Educational Value<\/h4>\n
        \n
      • \n

        Excellent examples for studying crystal growth habits<\/strong>, optical properties, and the effects of hydrothermal conditions on mineral formation.<\/p>\n<\/li>\n

      • \n

        Frequently used in mineral collections, teaching specimens, and geological study due to their clarity and well-developed morphology.<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

        Brazilian quartz points<\/strong> are naturally occurring \u03b1-quartz (SiO\u2082)<\/strong> crystals that crystallize in the trigonal crystal system<\/strong>. They typically form hexagonal prisms<\/strong> terminated by pyramidal faces, representing one of the clearest and most well-developed examples of quartz crystallization globally.<\/p>\n

        Formation and Geological Context<\/h4>\n
          \n
        • \n

          Quartz points from Brazil form primarily in hydrothermal veins, pegmatites, and granitic cavities<\/strong>.<\/p>\n<\/li>\n

        • \n

          Crystallization occurs from silica-saturated aqueous fluids<\/strong> under stable temperature and pressure conditions.<\/p>\n<\/li>\n

        • \n

          Variations in growth rate, fluid chemistry, and supersaturation produce features such as growth zoning, phantom layers, and internal fluid inclusions<\/strong>, which preserve records of changing environmental conditions during formation.<\/p>\n<\/li>\n

        • \n

          Large, clear crystals are indicative of slow, undisturbed crystallization<\/strong>, allowing the development of sharp, well-defined terminations.<\/p>\n<\/li>\n<\/ul>\n

          Physical and Crystallographic Properties<\/h4>\n
            \n
          • \n

            Chemical formula:<\/strong> SiO\u2082<\/p>\n<\/li>\n

          • \n

            Crystal system:<\/strong> Trigonal<\/p>\n<\/li>\n

          • \n

            Hardness:<\/strong> 7 (Mohs scale)<\/p>\n<\/li>\n

          • \n

            Density:<\/strong> ~2.65 g\/cm\u00b3<\/p>\n<\/li>\n

          • \n

            Cleavage:<\/strong> None; fracture:<\/strong> conchoidal<\/p>\n<\/li>\n

          • \n

            Luster:<\/strong> Vitreous<\/p>\n<\/li>\n<\/ul>\n","protected":false},"featured_media":896,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[24,20,23],"product_tag":[26],"class_list":["post-893","product","type-product","status-publish","has-post-thumbnail","product_cat-clearquartz","product_cat-crystals","product_cat-quartz","product_tag-quartz","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/product\/893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/comments?post=893"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/media\/896"}],"wp:attachment":[{"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/media?parent=893"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/product_brand?post=893"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/product_cat?post=893"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.rawtothecorecrystals.co.uk\/shop\/wp-json\/wp\/v2\/product_tag?post=893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}