Mica
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Black Tourmaline in Mica Polished 4mm Round
Bead World Gems
kn199.10Approximate beads per strand: 95 What is it: Tourmaline is part of a large group of boron silicate minerals with a wide range of colors. It has a Mohs hardness of 7 to 7.5. History: In the 1500s, a Spanish conquistador of Brazil, washed the dirt from a...kn199.10 -
Black Tourmaline in Mica Grade A Polished 8mm Round
Bead World Gems
kn300.46Approximate beads per strand: 45 What is it: Tourmaline is part of a large group of boron silicate minerals with a wide range of colors. It has a Mohs hardness of 7 to 7.5. History: In the 1500s, a Spanish conquistador of Brazil, washed the dirt from a...kn300.46 -
Black Tourmaline in Mica Grade A Polished 6mm Round
Bead World Gems
kn249.78Approximate beads per strand: 65 What is it: Tourmaline is part of a large group of boron silicate minerals with a wide range of colors. It has a Mohs hardness of 7 to 7.5. History: In the 1500s, a Spanish conquistador of Brazil, washed the dirt from a...kn249.78 -
Black Mica Polished 12mm Round
Bead World Gems
kn191.86Approximate beads per strand: 35 What is it: Mica is a silicate mineral that form in distinct layers. Mica is fairly light and soft, and sheets and flakes of mica are flexible. History: Mica was first mined in India about 4,000 years ago, where it...kn191.86 -
Black Mica Polished 6mm Round
Bead World Gems
kn106.79Approximate beads per strand: 65 What is it: Mica is a silicate mineral that form in distinct layers. Mica is fairly light and soft, and sheets and flakes of mica are flexible. History: Mica was first mined in India about 4,000 years ago, where it...kn106.79 -
Black Mica Polished 4mm Round
Bead World Gems
kn90.50Approximate beads per strand: 95 What is it: Mica is a silicate mineral that form in distinct layers. Mica is fairly light and soft, and sheets and flakes of mica are flexible. History: Mica was first mined in India about 4,000 years ago, where it...kn90.50