Where is tourmaline found in Nigeria?
Prominent locations with significant occurrences of tourmaline in southwestern Nigeria include Komu and Ofiki in Oyo state, Ijero in Ekiti state and Oro in Kwara state, where characteristic occurrences of euhedral gem tourmaline crystals are contained in granitoids intrusive rocks and their associated pegmatites and …
Where is tourmaline most commonly found?
Localities. Gem and specimen tourmaline is mined chiefly in Brazil and many parts of Africa, including Tanzania, Nigeria, Kenya, Madagascar, Mozambique, Malawi, and Namibia.
How much is raw tourmaline worth?
Most expensive are the Paraíba tourmalines, which may reach tens of thousands of dollars per carat. Chrome tourmalines, rubellites and fine indicolites and bi-colors may sell for as much as $1000/ct. or more. Other varieties are available for prices between $50–750/ct., depending on the richness of the color.
How much is black tourmaline worth?
Black Tourmaline price per carat usually ranges between Rs 150 per carat ($3 approx.) to Rs 400 per carat ($6.
How is tourmaline mined?
Tourmaline gem rough is mined from stream sediments in many parts of the world, often by artisanal miners. It generally occurs as small granules and pebbles that that have been rounded by the abrasion of stream transport. Tourmaline is often one of many different minerals produced from a single mining location.
What are the uses of tourmaline?
Tourmaline helps to create a shield around a person or room to prevent negative or unwelcome energies from entering. It is also grounding and helpful to balancing all of the chakras. The stone can even dissolve challenging energy and negative thought patterns, transmuting them into more beneficial energy and beliefs.
What Colour is a tourmaline?
They can be green, blue, or yellow, pink to red, colorless or color-zoned. Even slight changes in the composition can cause completely different colors. – Pink tourmaline is colored by the trace element manganese. Yellowish-brown tourmalines are called dravites, and black ones are referred to as schorl.
How do you know if a tourmaline is real?
Observe your pink tourmaline under a bright artificial light. Genuine tourmalines change color under artificial light, displaying a brownish undertone. If your stone is billed as a pink tourmaline and it does not display this undertone when exposed to artificial light, then you are likely looking at a fake gemstone.
How many types of tourmaline are there?
4 species
Only 4 species of tourmaline are of real importance to gemologists.