THE GEMSTONE PEARL



Pearls have been highly valued as gemstones since antiquity, and their allure and beauty has always been magnified by the difficulty of obtaining them in early times. Unlike most other gemstones which are minerals, Pearls are organic and are formed by living organisms. They are generally formed within the soft tissue layer of mollusks such as oysters and mussels. Pearls are composed of calcium carbonate (in the form of Aragonite) and organic conchiolin that build up as concentric layers as they




Agate

Alexandrite

Almandine

Amazonite

Amber

Amethyst

Ametrine

Andalusite

Andesine

Andradite

Aquamarine

Aventurine

Benitoite

Beryl

Bloodstone

Carnelian

Cat's Eye

Chalcedony

Chrysoberyl

Chrysocolla

Chrysoprase

Citrine

Copper

Coral

Danburite

Diamond

Diaspore

Diopside

Dumortierite

Emerald

Fluorite

Garnet

Gold

Golden Beryl

Goshenite

Grossular

Hiddenite

Iolite

Jade

Jasper

Kunzite

Kyanite

Labradorite

Lapis Lazuli

Larimar



Mining industry must spread social and environmental progress to small-scale mines

  1. Artisanal and small-scale mines, normally operating in the informal economy, produce a big chunk of the minerals we use every day -- about a fifth of the world's gold produced each year, for example. …
  2. {read by 31 people}


Artisanal miners being duped

  1. Fidelity Printers and Refiners (FPR) said on Monday artisanal miners, who are contributing significantly to the country's gold production, were being duped by middle-men who are buying the yellow meta…
  2. {read by 42 people}


How a young German director documented illegal gold mining in Ghana

  1. Filmmaker Johannes Preuss has received a student Oscar for his film, "Galamsey," which was shot in Ghana and looks at the illegal gold trade there. DW met him to discuss how the country could "turn in…
  2. {read by 71 people}


Gold war in Colombia: traditional miners against the state

  1. Luz Dary has spent more than half of her life in the mine. This 47-year-old Colombian woman is a chatarrera, a scrap collector: she toils away, every day, from six in the morning to six at night, alon…
  2. {read by 62 people}


Daily Grind: Women Stone Crushers Feed Demand for Construction in Kenya

  1. KISII, KENYA - On a fine afternoon in Nyantitira village, about 192 miles (310 km) west of Nairobi, Gladys Nanzala emerges from her house armed with a spade, a bucket and a few sacks. She is heading b…
  2. {read by 56 people}


SA's influence felt in start of African tin mine

  1. Two global events have led to development of a long-dormant deposit at Bisie - in thick forest in the war-torn corner of the Democratic Republic of Congo - in what will become Africa's only formal tin…
  2. {read by 79 people}



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