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Gemstone Treatment Terms
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Gemstone Treatment Terms

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Questions and Answers

What is the purpose of flux in gemstone treatment?

  • To lighten or remove color from a gemstone
  • To dissolve another compound at a lower temperature than its own melting point (correct)
  • To seal a fracture or cavity in a gemstone
  • To add color or affect color by deepening it

    • What is the result of quench crackling on a gemstone?

  • It produces fractures in a stone so it will accept dye (correct)
  • It heals fractures and cavities in a gemstone
  • It removes imperfections in a gemstone
  • It adds color or affects color by deepening it

    • What is the purpose of clarity enhancement treatment?

  • To add color or affect color by deepening it
  • To lighten or remove color from a gemstone
  • To improve the apparent clarity of a gem with a colorless or near-colorless filler (correct)
  • To seal a fracture or cavity in a gemstone

    • What is geuda?

    <p>A type of corundum that can be treated to a fine blue color</p> Signup and view all the answers

    What is the purpose of resin in gemstone treatment?

    <p>To fill fractures in gemstones</p> Signup and view all the answers

    What happens to a gemstone during heat treatment in an oxidizing environment?

    <p>Certain color-causing trace elements lose electrons</p> Signup and view all the answers

    What is the purpose of dyeing in gemstone treatment?

    <p>To add color or affect color by deepening it, making it more even, or changing it</p> Signup and view all the answers

    What is sugar treatment used for in opal treatment?

    <p>To darken an opal and bring out its play-of-color</p> Signup and view all the answers

    What is the purpose of fracture filling in gemstone treatment?

    <p>To conceal fractures and improve the apparent clarity of a gem</p> Signup and view all the answers

    What is the purpose of bleaching in gemstone treatment?

    <p>To lighten or remove color from a gemstone</p> Signup and view all the answers

    Which treatment is used to lighten or remove color from a gemstone?

    <p>Bleaching</p> Signup and view all the answers

    What type of environment surrounds a gem during heat treatment, causing certain color-causing trace elements to gain electrons?

    <p>Reducing environment</p> Signup and view all the answers

    What is the purpose of filling fractures or openings with melted wax, resin, polymer, or plastic?

    <p>To improve the gemstone's stability</p> Signup and view all the answers

    What is the result of rapid heating and cooling of a gemstone?

    <p>It develops fractures</p> Signup and view all the answers

    What is the purpose of resin in gemstone treatment?

    <p>To fill fractures in the gemstone</p> Signup and view all the answers

    What is the result of heat treatment in a reducing environment?

    <p>Certain color-causing trace elements gain electrons</p> Signup and view all the answers

    What is the purpose of colorless impregnation?

    <p>To fill pores or openings in the gemstone</p> Signup and view all the answers

    What is a a liquid filling material that is very durable when it dries?

    <p>Polymer</p> Signup and view all the answers

    What treatment involves heating a wrapped opal until smoke or ash penetrates its surface to darken it and bring out its play-of-color?

    <p>Smoke Treatment</p> Signup and view all the answers

    What treatment has a oxygen rich environment that surrounds a gem during the heat treatment , cause certain color-causing trace elements to lose electrons?

    <p>Oxidizing Environment</p> Signup and view all the answers

    What type of heat treatment in the presence of flux that results in the sealing of a fracture or cavity?

    <p>Flux Healing</p> Signup and view all the answers

    What is a human controlled process, beyond surface treatment, improves the appearance durability and value of a gem?

    <p>Treatment</p> Signup and view all the answers

    Which gem treatment exposes a gem to high temperatures and chemicals to allow penetration and color-causing elements ?

    <p>Lattice Diffusion</p> Signup and view all the answers

    What process alters a gems appearance by applying backings, coatings, and coloring agents?

    <p>Surface Modification</p> Signup and view all the answers

    Study Notes

    Gemstone Treatment Terms

    • Bleaching: a treatment that uses chemicals to lighten or remove color from a gemstone
    • Oxidizing environment: an oxygen-rich environment that causes certain color-causing trace elements to lose electrons during heat treatment
    • Clarity enhancement: a treatment that improves the apparent clarity of a gem with a colorless or near-colorless filler
    • Polymer: a liquid filling material that is very durable when it dries
    • Colorless impregnation: filling of pores or openings with melted wax, resin, polymer, or plastic to improve appearance and stability

    Gemstone Treatment Processes

    • Quench crackling: a rapid heating and cooling process that produces fractures in a stone so it will accept dye
    • Dyeing: a treatment that adds color or affects color by deepening it, making it more even, or changing it
    • Reducing environment: an oxygen-poor environment that surrounds a gem during heat treatment, causing certain color-causing trace elements to gain electrons
    • Flux: a compound that can dissolve another compound at a lower temperature than its own melting point
    • Flux healing: heat treatment in the presence of a flux that results in the sealing of a fracture or cavity
    • Resin: a clear, viscous substance used to fill fractures in gemstones
    • Fracture (fissure) filling: use of a colorless to near-colorless filler to conceal fractures and improve the apparent clarity of a gem

    Specific Gemstone Treatments

    • Geuda: milky, grayish, or brownish corundum that can be treated to a fine blue color
    • Smoke treatment: heating a wrapped opal until smoke or ash penetrates its surface to darken it and bring out its play-of-color
    • Sugar treatment: soaking an opal in a hot sugar solution

    Gemstone Treatment Terms

    • Bleaching: a treatment that uses chemicals to lighten or remove color from a gemstone
    • Oxidizing environment: an oxygen-rich environment that causes certain color-causing trace elements to lose electrons during heat treatment
    • Clarity enhancement: a treatment that improves the apparent clarity of a gem with a colorless or near-colorless filler
    • Polymer: a liquid filling material that is very durable when it dries
    • Colorless impregnation: filling of pores or openings with melted wax, resin, polymer, or plastic to improve appearance and stability

    Gemstone Treatment Processes

    • Quench crackling: a rapid heating and cooling process that produces fractures in a stone so it will accept dye
    • Dyeing: a treatment that adds color or affects color by deepening it, making it more even, or changing it
    • Reducing environment: an oxygen-poor environment that surrounds a gem during heat treatment, causing certain color-causing trace elements to gain electrons
    • Flux: a compound that can dissolve another compound at a lower temperature than its own melting point
    • Flux healing: heat treatment in the presence of a flux that results in the sealing of a fracture or cavity
    • Resin: a clear, viscous substance used to fill fractures in gemstones
    • Fracture (fissure) filling: use of a colorless to near-colorless filler to conceal fractures and improve the apparent clarity of a gem

    Specific Gemstone Treatments

    • Geuda: milky, grayish, or brownish corundum that can be treated to a fine blue color
    • Smoke treatment: heating a wrapped opal until smoke or ash penetrates its surface to darken it and bring out its play-of-color
    • Sugar treatment: soaking an opal in a hot sugar solution

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    Related Documents

    CS Book 1_AS- 6 KT .pdf

    Description

    Learn the different terms used in gemstone treatment, including bleaching, oxidizing environment, clarity enhancement, and more.

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