{"id":271,"date":"2025-11-28T08:00:44","date_gmt":"2025-11-28T08:00:44","guid":{"rendered":"https:\/\/mincool.org\/?p=271"},"modified":"2026-01-12T07:49:42","modified_gmt":"2026-01-12T07:49:42","slug":"collection6","status":"publish","type":"post","link":"https:\/\/mincool.org\/en\/collection6\/","title":{"rendered":"Africa - Tumbled Stone Collection"},"content":{"rendered":"

Africa
Tumbled Stone Collection<\/h2>\n\n\n\n

Join us to discover the African continent, where you will find some of the world's oldest and most geologically rich deposits. This unique collection of tumbled stones offers you a glimpse into the amazing mineral wealth that this fascinating continent holds. Each stone in this set is a tangible memory of the African landscape, carrying within it a message about the origin and power of our planet.<\/p>\n\n\n\n

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TIGER\u2019S EYE (South Africa)<\/strong><\/p>\n\n\n\n

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  • Characteristics:<\/strong> Tiger's eye is a golden-brown variety of quartz with a silky luster and a unique optical phenomenon, the so-called \"cat's eye effect.\" Its impressive appearance and shiny reflections make it a popular material for the production of exclusive figurines and jewelry.<\/li>\n\n\n\n
  • Formation: <\/strong>The stone is formed by the alteration of the asbestos mineral crocidolite, which is gradually replaced by quartz. Its original fibrous structure is preserved, which causes the attractive optical effect.<\/li>\n\n\n\n
  • Occurrence:<\/strong> The largest deposits are found in South Africa, as well as in Australia and the USA. This stone comes from mines near the town of Prieska in South Africa.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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    PINK (South Africa.<\/strong>)<\/strong><\/p>\n\n\n\n

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    • Characteristics:<\/strong> Rose quartz is a light to deep pink variety of quartz, which is often milky and cloudy. While it was previously thought that its color was due to the presence of manganese, more recent scientific studies have shown that the color is actually caused by fine inclusions of the mineral dumortierite. Rose quartz is very popular in jewelry and as a decorative stone.<\/li>\n\n\n\n
    • Formation: <\/strong>It forms in the inner parts of pegmatite veins, where it slowly crystallizes from mineral solutions. The stone's pink color can gradually fade when exposed to sunlight.<\/li>\n\n\n\n
    • Occurrence:<\/strong> Most rose quartz is mined in Brazil and Madagascar, but it also occurs in the USA, India, and the Czech Republic (for example, in the Vyso\u010dina region). This stone comes from mines on the border between Namibia and South Africa.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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      SODALITE (Namibia)<\/strong><\/p>\n\n\n\n

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      • Characteristics:<\/strong> Sodalite is a blue, sometimes blue-white or grayish-blue mineral, often confused with lapis lazuli. It is opaque with a waxy luster and is not very hard (reaching a hardness of 5.5\u20136 on the Mohs scale). It is widely used for the production of exclusive tiles and gigantic interior sculptures.<\/li>\n\n\n\n
      • Formation:<\/strong> It is formed in alkaline igneous rocks, especially in syenites and nephelinites, where it is created during the cooling of magma with a low silica content.<\/li>\n\n\n\n
      • Occurrence:<\/strong> Rich deposits are found in Canada (Ontario), Russia, Namibia, and Greenland. Our stone comes from mines in the Kaokoland region of Namibia.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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        AMETHYST CHEVRON (Zambia)<\/strong><\/p>\n\n\n\n

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        • Characteristics: <\/strong>Chevron amethyst is an attractive variety of amethyst characterized by distinctive V-shaped banding. It combines the purple color of amethyst with white to gray layers of quartz. It has a glassy luster and is semi-translucent to transparent.<\/li>\n\n\n\n
        • Formation: <\/strong>This stone forms from the deposition of silica-rich solutions in rock cavities. During this process, layers rich in silicon oxide with iron impurities (amethyst) alternate with purer layers of milky quartz. Natural radiation then causes the iron-containing layers to transform into amethyst and gain their typical purple color. The regular alternation of these layers creates the characteristic chevron-shaped bands.<\/li>\n\n\n\n
        • Occurrence: <\/strong>Significant deposits of Chevron Amethyst are located in Brazil and Zambia, which produce the highest-quality pieces. Other locations include Namibia, India, the USA, and Russia. This particular stone comes from Zambia.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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          AMAZONITE (Madagascar)<\/strong><\/p>\n\n\n\n

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          • Characteristics:<\/strong> Amazonite, a variety of the mineral microcline (a feldspar), is a green to turquoise-blue stone. It has a glassy luster and often features characteristic white streaks or spots.<\/li>\n\n\n\n
          • Formation: <\/strong>Amazonite forms in granitic pegmatites, which are created by the slow cooling of potassium-rich magma. Special conditions allow trace elements, most commonly lead or nickel, to be incorporated into the crystal, giving the stone its green color.<\/li>\n\n\n\n
          • Occurrence: <\/strong>Amazonite is found in Angola, Russia (the Urals), Brazil, and the USA (Colorado). This particular stone comes from mines near the town of Antsirabe in Madagascar.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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            RED JASPER (South Africa)<\/strong><\/p>\n\n\n\n

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            • Characteristics: <\/strong>Jasper is an opaque variety of quartz, and its vibrant red color is due to the presence of iron oxides. It is often adorned with patterns of white spots or stripes.<\/li>\n\n\n\n
            • Formation:<\/strong> The stone forms from the sedimentation of silica-rich material enriched with iron minerals. It often deposits in sedimentary basins. It can also have a volcanic origin, where iron oxides penetrate silica-rich rocks. In addition, it can form through hydrothermal processes.<\/li>\n\n\n\n
            • Occurrence: <\/strong>Significant deposits are found in South Africa, India, and Brazil. African jaspers boast deep red shades, often complemented by white quartz bands. This particular stone comes from mines near the South African town of Postmasburg in the Northern Cape.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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              PREHNITE (South Africa)<\/strong><\/p>\n\n\n\n

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              • Characteristics: <\/strong>Prehnite is a light green to yellowish-green mineral with a pearly luster. It has a fine, often translucent structure. It commonly occurs in the form of spherical aggregates or crusts. Prehnite is very popular as a collector's and decorative stone.<\/li>\n\n\n\n
              • Formation: <\/strong>It forms in the cavities of basalts and other volcanic rocks. Its formation is linked to hydrothermal activity, where hot solutions deposit minerals into open spaces. It often occurs alongside minerals like zeolite, calcite, or epidote.<\/li>\n\n\n\n
              • Occurrence: <\/strong>The best-known deposit is in South Africa (Cape Province). Other significant locations are in Australia, the USA, and China. This particular stone comes from South Africa.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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                GREY AGATE (Botswana)<\/strong><\/p>\n\n\n\n

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                • Characteristics: <\/strong>Botswana agates are popular for their delicate banding, distinct structure, and rich color palette. The most sought-after among collectors and jewelers are the gray agates with striking white stripes.<\/li>\n\n\n\n
                • Formation:<\/strong> Botswana agates formed 190\u2013200 million years ago during volcanic activity. As lava cooled, cavities from gas bubbles were created, which were then filled with water rich in silica and other minerals. The gradual deposition of silica minerals created the characteristic banding of the agates. The chemical composition, temperature, and pressure influenced the resulting colors and patterns.<\/li>\n\n\n\n
                • Occurrence: <\/strong>The main deposits of Botswana agates are located in the area around the town of Bobonong, near the border with Zimbabwe. Agates can be found in their original rock, weathered freely on the surface, or in riverbeds.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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                  GARNET MATRIX (Namibia)<\/strong><\/p>\n\n\n\n

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                  • Characteristics:<\/strong> Garnet represents an entire group of minerals with a wide variety of colors\u2014from red to brown to green. Garnet that is still embedded in the host rock (matrix) creates very attractive combinations and often appears with clearly visible crystal shapes. Due to its beauty and diversity, garnet is popular in both jewelry and as a collector's stone.<\/li>\n\n\n\n
                  • Formation: <\/strong>Garnet crystallizes during the metamorphosis of rocks under high pressure and temperature. It forms especially during the transformation of clay-rich rocks into gneisses and schists. This mineral often appears as well-developed dodecahedral crystals. The presence of garnet in the matrix creates an attractive contrast with the surrounding rock.<\/li>\n\n\n\n
                  • Occurrence: <\/strong>Garnet is found in rocks all over the world. In places where the host rock weathers, garnets are released and deposited in sediments, where they accumulate. This leads to the formation of mineable deposits in locations such as Tanzania, India, and the Czech Republic. This particular stone comes from Namibia and is unique because it contains well-preserved examples of brown grossular garnet in the matrix.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
                    \"\"<\/figure>","protected":false},"excerpt":{"rendered":"

                    Join us to discover the African continent, where you will find some of the world's oldest and most geologically rich deposits. This unique collection of tumbled stones offers you a glimpse into the amazing mineral wealth that this fascinating continent holds. Each stone in this set is a tangible memory of the African landscape, carrying within it a message about the origin and power of our planet.<\/p>","protected":false},"author":1,"featured_media":322,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-271","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-category-2"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/posts\/271","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/comments?post=271"}],"version-history":[{"count":13,"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/posts\/271\/revisions"}],"predecessor-version":[{"id":591,"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/posts\/271\/revisions\/591"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/media\/322"}],"wp:attachment":[{"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/media?parent=271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/categories?post=271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mincool.org\/en\/wp-json\/wp\/v2\/tags?post=271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}