Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. Optical properties: Biaxial (-) Category: Nesosilicate Formula: (Mg,Fe2+)Al3(BO3)(SiO4)O2 Crystal system: Orthorhombic Color: Bluish green Dispersion: strong Hardness: 7 to 7.5 Refractive Index: 1.590 to 1.623 Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka and few gem quality specimens have come mainly from Madagascar.
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Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. Optical properties: Biaxial (-) Category: Nesosilicate Formula: (Mg,Fe2+)Al3(BO3)(SiO4)O2 Crystal system: Orthorhombic Color: Bluish green Dispersion: strong Hardness: 7 to 7.5 Refractive Index: 1.590 to 1.623 Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka and few gem quality specimens have come mainly from Madagascar.
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Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. Optical properties: Biaxial (-) Category: Nesosilicate Formula: (Mg,Fe2+)Al3(BO3)(SiO4)O2 Crystal system: Orthorhombic Color: Bluish green Dispersion: strong Hardness: 7 to 7.5 Refractive Index: 1.590 to 1.623 Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka and few gem quality specimens have come mainly from Madagascar.
  • Save
Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. Optical properties: Biaxial (-) Category: Nesosilicate Formula: (Mg,Fe2+)Al3(BO3)(SiO4)O2 Crystal system: Orthorhombic Color: Bluish green Dispersion: strong Hardness: 7 to 7.5 Refractive Index: 1.590 to 1.623 Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka and few gem quality specimens have come mainly from Madagascar.
  • Save
Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. Optical properties: Biaxial (-) Category: Nesosilicate Formula: (Mg,Fe2+)Al3(BO3)(SiO4)O2 Crystal system: Orthorhombic Color: Bluish green Dispersion: strong Hardness: 7 to 7.5 Refractive Index: 1.590 to 1.623 Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka and few gem quality specimens have come mainly from Madagascar.
  • Save
Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. Optical properties: Biaxial (-) Category: Nesosilicate Formula: (Mg,Fe2+)Al3(BO3)(SiO4)O2 Crystal system: Orthorhombic Color: Bluish green Dispersion: strong Hardness: 7 to 7.5 Refractive Index: 1.590 to 1.623 Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka and few gem quality specimens have come mainly from Madagascar.
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Rare Grandidierite Specimen

Grandidierite has been found in only a few locations around the world, including Malawi, Namibia, and Sri Lanka and few gem-quality specimens have come mainly from Madagascar.

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Description

Grandidierite Specimen

 

Dimension: 54mm x 50mm x 25mm

Weight: 472.45Cts

Mineral: Madagascar

Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. Optical properties: Biaxial (-) Category: Nesosilicate Formula: (Mg,Fe2+)Al3(BO3)(SiO4)O2 Crystal system: Orthorhombic Color: Bluish green Dispersion: strong Hardness: 7 to 7.5 Refractive Index: 1.590 to 1.623 Grandidierite have been found in only a few locations around the world, including Malawi, Namibia and Sri Lanka and few gem quality specimens have come mainly from Madagascar.
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Extremely Rare Gemstone – Natural Grandidierite

Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. Grandidierite is nesosilicates mineral with the chemical formula (Mg, Fe2+)(Al, Fe3+)3(SiO4)(BO3)O2.
It is found colors such as Bluish-green, greenish-blue with 7½ hardness according to the more hardness scale. Grandidierite can be seen Vitreous, Pearly luster stones with 2.98 – 2.99 Specific Gravity. This gemstone was named in honor of French explorer Alfred Grandidier who studied the natural history of Madagascar. He is a French explorer and Naturalist. Grandidierite has very strong dispersion and Visible Pleochroism, It is a Nesosilicates orthorhombic Mineral with Biaxial (-) Optical Properties.
Inside of grandidierite mostly can be seen very perfect cleavages. As an optical properties, it has a 1.583 – 1.639 refractive index.
Grandidierite can be found in India, Germany, Denmark, Malawi, Namibia, India, Norway, and Sri Lanka. Grandidierite’s main source is Madagascar.

Extremely Rare Gemstone - Natural Grandidierite
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Healing Properties of Grandidierite

Grandidierite is a blue gemstone that promotes spiritual awakening, peace, and tranquility and can encourage you to communicate in a calm and clear manner.

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