Sapphire Mineral Specimen U#4 - 283.2ct Needs Pictures Mangano Calcite derives its name

Mangano Calcite derives its name from a mineral inclusion found in the stone called Manganese

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The shape is irregular and the sizes vary in the form of a nugget

Red Jasper Tumbled Stones - Brazil

Sapphire Mineral Specimen U#4 - 283.2ct Needs Pictures Mangano Calcite derives its nameSapphire Mineral Specimens A Unique #4 The Color has the greatest influence on a sapphires value, The most valued blue sapphires are velvety blue to violet blue, in medium to medium dark tones. Less valuable blue sapphires might also be grayish, or too light in tone. While it is found in hues ranging from pale baby blue to an intense royal blue. This rough blue sapphire is still in its rough state, and not much blue tones are visible on the stone