close
test_template

Ethiopian Opal Treatments

download print

About this sample

About this sample

close

Words: 516 |

Page: 1|

3 min read

Published: Feb 12, 2019

Words: 516|Page: 1|3 min read

Published: Feb 12, 2019

Table of contents

  1. Dye Treatment
  2. Smoke Treatment
  3. Sugar/Acid Treatment

Ethiopian opals, many of them are sold in their natural state. Others are treated, for example, dye, smoke and sugar/acid treatments. All of these treatments make the opal less expensive, and when the opal is natural it is far more expensive than the treated ones. The treated opals can cost less or more than the natural opals this depends on the cost on the process this opal went through. The first treatment I will talk about is the dye treatment, then the smoke treatment, and finally the sugar/acid treatment.

'Why Violent Video Games Shouldn't Be Banned'?

Dye Treatment

Hydrophane opals, like those found in Ethiopia, are easy to dye because their millions of tiny holes it, naturally absorbs liquids. When dying the opal is like it is sucking all the color up, because of the pores inside of it. People, who know opals, can identify dyed opal on-sight when an abnormal color is used. For example, a neon blue color is easy to tell that the color is a fake but other people feel like it is natural. However, the practice of slightly improving an opal’s natural color, with dye can be much less obvious. In these cases, dye treatments can often be detected with microscopic examination or by cutting into the opal to see if the color is concentrated near the surface. Some large buyers of cut opal or finished jewelry require the seller’s to provide samples of the opal rough when making large purchases. The samples are used for testing and comparison to make sure that the finished stones and jewelry, they are purchasing have not been treated. Color enhancements can increase the marketability and price of the opal if it is not obvious. For this reason, if a buyer wants natural-color opal, testing to confirm that the color is not caused by dye is important.

Smoke Treatment

Smoke is a suspension of very fine particles in air or gas. Fine smoke particles can enter the pore spaces of an opal and change its natural color. The smoke treatment can be done by wrapping the opal in paper and heating the paper to a temperature that produces burning. The burning paper releases fine particles of black soot; a black substance, that enters the pores of the opal and darken its color. The darker color contrasts with the opal’s play-of-color, making it appear stronger and more obvious.

Smoke treatment can sometimes be detected by looking for black soot particles during microscopic examination. These can often be seen individually, or in concentrations along cracks within the opal. Laboratory tests, such as Raman microscopy, have the ability to detect smoke treatment because they can detect carbon, which is normally absent in opals of volcanic origin.

Get a custom paper now from our expert writers.

Sugar/Acid Treatment

The sugar/acid treatment is done by soaking opal for a few days in a warm solution of sugar water, then submerging the opal in concentrated sulfuric acid. The acid melts the sugar in the pore spaces of the opal, producing dark-colored carbon particles and stains. This imparts or darkens a gray, black, or brown color in the opal. Like smoke treatment, these can be detected by microscopic examination or by laboratory tests for carbon.

Image of Alex Wood
This essay was reviewed by
Alex Wood

Cite this Essay

Ethiopian Opal Treatments. (2019, February 11). GradesFixer. Retrieved April 14, 2024, from https://gradesfixer.com/free-essay-examples/ethiopian-opal-treatments/
“Ethiopian Opal Treatments.” GradesFixer, 11 Feb. 2019, gradesfixer.com/free-essay-examples/ethiopian-opal-treatments/
Ethiopian Opal Treatments. [online]. Available at: <https://gradesfixer.com/free-essay-examples/ethiopian-opal-treatments/> [Accessed 14 Apr. 2024].
Ethiopian Opal Treatments [Internet]. GradesFixer. 2019 Feb 11 [cited 2024 Apr 14]. Available from: https://gradesfixer.com/free-essay-examples/ethiopian-opal-treatments/
copy
Keep in mind: This sample was shared by another student.
  • 450+ experts on 30 subjects ready to help
  • Custom essay delivered in as few as 3 hours
Write my essay

Still can’t find what you need?

Browse our vast selection of original essay samples, each expertly formatted and styled

close

Where do you want us to send this sample?

    By clicking “Continue”, you agree to our terms of service and privacy policy.

    close

    Be careful. This essay is not unique

    This essay was donated by a student and is likely to have been used and submitted before

    Download this Sample

    Free samples may contain mistakes and not unique parts

    close

    Sorry, we could not paraphrase this essay. Our professional writers can rewrite it and get you a unique paper.

    close

    Thanks!

    Please check your inbox.

    We can write you a custom essay that will follow your exact instructions and meet the deadlines. Let's fix your grades together!

    clock-banner-side

    Get Your
    Personalized Essay in 3 Hours or Less!

    exit-popup-close
    We can help you get a better grade and deliver your task on time!
    • Instructions Followed To The Letter
    • Deadlines Met At Every Stage
    • Unique And Plagiarism Free
    Order your paper now