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Opinions---Rose cut white sapphires

Discussion in 'Colored Gemstones' started by sharkiee00, Sep 20, 2012.

  1. sharkiee00
    Rough_Rock

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    by sharkiee00 » Sep 20, 2012
    Hello,

    So I am looking to have a bezel eternity band made with rose cut stones. I was thinking that white sapphires would go nicely in it and began to search and found a source for them out of county, but was looking to see if maybe someone in the US could cut them for me. I'm looking for 4mm rose cut stones. So I emailed two faceters/vendors and one stated that they would be looking for some rough or even a source to buy from. The other stated that rose cut sapphires would be "terrible" and would look like cut glass and I should find a different material. Is this true. I have seen pictures of the out of country vendor and they don't look like cut glass to me, but that is just a picture. I know that typically rose cut diamonds don't disply much fire or brilliance because of the cut so I assumed a white sapphire would look similar I don't want it looking like glass either. Please provide your opinions. Thanks
     
    


    


  2. chrono
    Super_Ideal_Rock

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    by chrono » Sep 20, 2012
    Most lapidaries will not bother to cut sapphires that small - it's just not that time cost effective for them. Rose cut stones are huge light leakers and even diamonds aren't sparkly in this type of cut. Given that the RI of sapphire is even lower than that of a diamonds, I concur with the second lapidary that it will look like cut glass. ;(
     
  3. sharkiee00
    Rough_Rock

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    by sharkiee00 » Sep 20, 2012
    Thanks so much for the explantation...that really helps me....sooo what would be another option for a colorless stone. What about white topaz or even white zircon? Are their RIs any better than the white sapphire.
     
  4. chrono
    Super_Ideal_Rock

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    by chrono » Sep 20, 2012
    Refractive Index (sparkle)
    Diamond = 2.417 - 2.419
    Sapphire = 1.762 - 1.778
    Topaz = 1.609 - 1.643
    Zircon = 1.81 - 2.024

    Dispersion (fire)
    Diamond = 0.044
    Sapphire = 0.018
    Topaz = 0.014
    Zircon = 0.039

    As you can see, zircon is close. The reason why zircon is not a good substitute is because they chip easily. Wear and tear such as facet abrasion is very commonly seen in ring stones after just a short period of time if worn frequently. With an eternity ring, the girdle is protected but the table facets remain exposed.
     
    


    


  5. sharkiee00
    Rough_Rock

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    by sharkiee00 » Sep 20, 2012
    So...that's kinda depressing...lol...if you in my position what would you do. I want a rose cut eternity band but don't want to send the diamond price?
     
  6. chrono
    Super_Ideal_Rock

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    by chrono » Sep 20, 2012
    Synthetic is the best of both worlds if you can get over the non-natural mind block.
     

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