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What is the primary factor that determines the value of lapis lazuli?
What is the most common shape that turquoise is cut into?
Which of the following is NOT a treatment used to enhance lapis lazuli?
What is the term for turquoise that has a network of fine lines or patterns?
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Which region is the largest producer of turquoise?
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What is the primary reason why people value turquoise?
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What is the most common type of turquoise imitation?
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Turquoise is judged by what qualities?
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What is the term for lapis lazuli that has a high concentration of calcite?
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What is the reason why turquoise is often treated?
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What is the result of iron presence in turquoise?
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Which of the following is a characteristic of lapis lazuli's prized royal blue color?
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What is the typical market condition for lapis lazuli?
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Which of the following is a major source of turquoise?
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What is the primary purpose of heating and then dying lapis lazuli?
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What is the characteristic of turquoise that commands the highest prices?
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Which of the following is a common imitation of lapis lazuli?
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What is the most prized color of turquoise?
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What is the purpose of treating turquoise?
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What is the characteristic of lapis lazuli that affects its value?
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What is the manager source for Lapis Lazuli in general as well as the top source for best color ?
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A turquoise imitation made of a mixture of powered minerals, dyed and bonded with plastic and epoxy resin ?
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Trade term for polymer impregnated turquoise ?
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Study Notes
Lapis Lazuli and Turquoise
Lapis Lazuli
- Valued for its history and rich blue color
- Royal blue color produced by lazurite
- Presence or absence of calcite or pyrite affects value
- Value based on color and presence of calcite or pyrite
- May be dyed, impregnated with wax or plastic, or heated and then dyed
- Afghanistan is the world's major source of lapis lazuli
Turquoise
- Iron causes greenish-blue color, copper produces pure blue color
- Matrix-free and spiderweb turquoise command highest prices
- Cut into cabochons, beads, or flat pieces for inlays
- Porous and coarse turquoise often treated to improve color and texture
- Southwestern US is the world's largest producer of turquoise
- China's Hubei Province is the major source of top-color turquoise
- Judged by color, texture, and matrix
- Intense, uniform, medium blue is the most prized color
- Translucent to opaque gemstones prized for exotic colors and distinctive markings
Lapis Lazuli and Turquoise
Lapis Lazuli
- Valued for its history and rich blue color
- Royal blue color produced by lazurite
- Presence or absence of calcite or pyrite affects value
- Value based on color and presence of calcite or pyrite
- May be dyed, impregnated with wax or plastic, or heated and then dyed
- Afghanistan is the world's major source of lapis lazuli
Turquoise
- Iron causes greenish-blue color, copper produces pure blue color
- Matrix-free and spiderweb turquoise command highest prices
- Cut into cabochons, beads, or flat pieces for inlays
- Porous and coarse turquoise often treated to improve color and texture
- Southwestern US is the world's largest producer of turquoise
- China's Hubei Province is the major source of top-color turquoise
- Judged by color, texture, and matrix
- Intense, uniform, medium blue is the most prized color
- Translucent to opaque gemstones prized for exotic colors and distinctive markings
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Description
This quiz explores the properties and values of lapis lazuli and turquoise, including their colors, compositions, and price determinants.
