Podcast
Questions and Answers
What is the primary factor that determines the value of lapis lazuli?
What is the primary factor that determines the value of lapis lazuli?
- The presence of pyrite
- The presence of lazurite (correct)
- The presence of calcite
- The presence of copper
What is the most common shape that turquoise is cut into?
What is the most common shape that turquoise is cut into?
- Cabochons (correct)
- Octagons
- Beads
- Flat pieces
Which of the following is NOT a treatment used to enhance lapis lazuli?
Which of the following is NOT a treatment used to enhance lapis lazuli?
- Polishing (correct)
- Dyeing
- Impregnating with wax or plastic
- Heat treatment
What is the term for turquoise that has a network of fine lines or patterns?
What is the term for turquoise that has a network of fine lines or patterns?
Which region is the largest producer of turquoise?
Which region is the largest producer of turquoise?
What is the primary reason why people value turquoise?
What is the primary reason why people value turquoise?
What is the most common type of turquoise imitation?
What is the most common type of turquoise imitation?
Turquoise is judged by what qualities?
Turquoise is judged by what qualities?
What is the term for lapis lazuli that has a high concentration of calcite?
What is the term for lapis lazuli that has a high concentration of calcite?
What is the reason why turquoise is often treated?
What is the reason why turquoise is often treated?
What is the result of iron presence in turquoise?
What is the result of iron presence in turquoise?
Which of the following is a characteristic of lapis lazuli's prized royal blue color?
Which of the following is a characteristic of lapis lazuli's prized royal blue color?
What is the typical market condition for lapis lazuli?
What is the typical market condition for lapis lazuli?
Which of the following is a major source of turquoise?
Which of the following is a major source of turquoise?
What is the primary purpose of heating and then dying lapis lazuli?
What is the primary purpose of heating and then dying lapis lazuli?
What is the characteristic of turquoise that commands the highest prices?
What is the characteristic of turquoise that commands the highest prices?
Which of the following is a common imitation of lapis lazuli?
Which of the following is a common imitation of lapis lazuli?
What is the most prized color of turquoise?
What is the most prized color of turquoise?
What is the purpose of treating turquoise?
What is the purpose of treating turquoise?
What is the characteristic of lapis lazuli that affects its value?
What is the characteristic of lapis lazuli that affects its value?
What is the manager source for Lapis Lazuli in general as well as the top source for best color ?
What is the manager source for Lapis Lazuli in general as well as the top source for best color ?
A turquoise imitation made of a mixture of powered minerals, dyed and bonded with plastic and epoxy resin ?
A turquoise imitation made of a mixture of powered minerals, dyed and bonded with plastic and epoxy resin ?
Trade term for polymer impregnated turquoise ?
Trade term for polymer impregnated turquoise ?
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.
