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Source: Brazil, Kenya, Madagascar, Mozambique, Pakistan, Tanzania, Zambia, United States. Mineral: Tourmaline Hardness: 7-7.5 Colour: all colours including bi-colour, watermelon tourmaline slices, green tourmaline and rubellite. Clarity; Inclusions in tourmaline...
Source: Australia, Brazil, Ethiopia, Mexico, Peru and United States. Mineral: Hydrated silica. Hardness: 5-6.5 Colour: Varying colour Clarity: They can range from completely transparent to opaque. Some opals can have...
Source: USA, Colombia, Brazil, Mozambique, Madagascar. Mineral: Beryl Hardness: 7.5-8 Colour: Pink, peach or orange. Clarity: Very few inclusions, clean to the eye. Treatment: Most are natural, some orange ones...
Source: Tanzania Mineral: Zoisite Hardness: 6-7 Colour: Blue to bluish purple (post heat treatment) and green. Treatments: Most Tanzanites are heat treated to transform the brown Zoisite into the blue...
Source: Brazil, Russia, Pakistan and Sri Lanka Mineral: Topaz Hardness: 8 Colour: Yellow, orange, brown, pink to red, purple, blue, green and colourless. Clarity: Blue topaz has the least inclusions...
Sources: Australia, Cambodia, China, Ethiopia, Kenya, Madagascar, Sri Lanka, Tanzania Mineral: Corundum Hardness: 9 Colour: Every colour apart from red Clarity: They usually have inclusions. This is a property of...
Source: Kenya, Madagascar, Sri Lanka, Pakistan, Tanzania, Thailand Mineral: Corundum Hardness: 9 Colour: Vibrant red to slight purple red Clarity: Inclusions are visible in most rubies, the less inclusions the...
Source: Afghanistan, Brazil, East Africa, Nigeria, Mozambique, Madagascar, U.S.A Mineral: Tourmaline Hardness: 7-7.5 Colour: Neon blue, green blue and mint green Clarity: Most have natural inclusions Treatment: The copper element...
Source: Brazil, Pakistan, U.S.A, Uruguay and Zambia Mineral: Beryl Hardness: 7.5-8 Colour: Greenish blue Clarity: The best quality are eye-clean, transparent gems. Some carry inclusions of long, hollow rods which...
Sources: Brazil, USA, Uruguay and Zambia Mineral: Quartz Hardness: 7 Amethyst Colour: Purple with shades varying from dark to light Ametrine Colour: Mix of amethyst purple and citrine yellow caused...
