Blue Dumortierite Oval Stone Beads Half Strand for Jewelry Making.
This is for a 10 bead strand of hand carved beautiful blue DUMORTIERITE Beads. These beads are a lovely denim blue. These are perfect for adding a touch of glamour to any of the pieces you are working on! Great for necklaces, earrings and pendants.
Dumortierite is a fibrous variably colored aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartz containing abundant dumortierite inclusions.
Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugène Dumortier (1803-1873).[4] It typically occurs in high temperature aluminium rich regional metamorphic rocks, those resulting from contact metamorphism and also in boron rich pegmatites. The most extensive investigation on dumortierite was done on samples from the high grade metamorphic Gfohl unit in Austria by Fuchs et al. (2005).
Quantity: 10 Bead(s)
Material Type: Dumortierite
Size: 18x13x7
Hole Size: 0.6mm
Color: Blue
Legend: It is a stone for dreaming and remembering.
Origin: Madagascar
NOTE: Your bead will be selected from those imaged.
NOTE: Images do not reflect number and size. Please see detail and table for information.
This is for a 10 bead strand of hand carved beautiful blue DUMORTIERITE Beads. These beads are a lovely denim blue. These are perfect for adding a touch of glamour to any of the pieces you are working on! Great for necklaces, earrings and pendants.
Dumortierite is a fibrous variably colored aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartz containing abundant dumortierite inclusions.
Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugène Dumortier (1803-1873).[4] It typically occurs in high temperature aluminium rich regional metamorphic rocks, those resulting from contact metamorphism and also in boron rich pegmatites. The most extensive investigation on dumortierite was done on samples from the high grade metamorphic Gfohl unit in Austria by Fuchs et al. (2005).
Quantity: 10 Bead(s)
Material Type: Dumortierite
Size: 18x13x7
Hole Size: 0.6mm
Color: Blue
Legend: It is a stone for dreaming and remembering.
Origin: Madagascar
NOTE: Your bead will be selected from those imaged.
NOTE: Images do not reflect number and size. Please see detail and table for information.