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  • Is this natural ?

    Could someone please advise if this "citrine" which is stated as rare and natural in the description is for real ? Thanks
    Citrines - !!!! RARE !!!! Natural 17.96ct Green & Yellow Citrine for sale in Uitenhage

  • #2
    MK Jewels are known to be reliable and trustworthy sellers. Ask them questions - perhaps they'll even give you a certificate of authenticity (although you might have to pay for it!)
    Yesterday I was clever and wanted to change the world.
    Today I am wise and am changing myself.

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    • #3
      "To respond the the forum topic, the stone is Natural as we buy these gemstones from a trustworthy supplier, certificates are not supplied, but that does not stop the client to obtain such from any lab here in South Africa. Hope this helps with the above. Regards MK"
      Questions about Item
      bidorbuy Forum Administrator



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      • #4
        Hi Shoron

        Sadly this is not genuine citrine!

        It falls under the hydrothermal category and as such I am bitterly disappointed that firstly such a reliable supplier can list the item incorrectly (obviously their supplier has misled them), and secondly that buyers actually fall into the "high increment" trap of the "real thing"!

        Natural citrine as it comes out of the earth is almost clear in colour! Exceptionally pale yellow tinge, but gets darker when heat is applied - thus you getting almost an "orange" tinge in some gems. This is for the facetted as well as the "raw" item. The bi-coloured stones (be it purple & yellow, blue & yellow, green & yellow, etc) are not naturally those colours.

        Although one must keep in mind that you do get the natural purple & yellow (Ametrine), but here again the natural "untouched" version is very pale.

        Hope this clarifies matters.

        Cali Craft
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        • #5
          The below is a very interesting site relating to "false" or "fake" crystals / minerals:

          PS. I notified MK Jewels of this thread along with the info being discussed and they have withdrawn the gems from the listings.
          Last edited by admin; 30-10-09, 11:28. Reason: Deleted link, website has links to other sites not allowed on the forum
          Click here for great deals!

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          • #6
            Thank you MK Jewels

            The item with Id 16778235 has been deleted.

            Item deleted
            bidorbuy Forum Administrator



            bidorbuy.co.za - Africa's largest market place.
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            • #7
              Courtesy of GemSelect:

              Hydrothermal Quartz is one of the most common minerals in nature, and the price of natural quartz is quite low. Only the special colored varieties, such as violet amethyst and yellow citrine, command prices over a few dollars a carat.
              Given the low price for natural quartz varieties, it may come as a surprise that there is a large industry producing synthetic quartz using a method known as hydrothermal transport and recrystallization.
              Synthetic Hydrothermal Ametrine QuartzThough the cost of producing synthetic quartz is not much less than mining natural quartz, a large industry has grown up to create synthetic quartz for modern technology. Massive quantities of quartz are used as a piezoelectric material in oscillators, gauges, microphones, clocks and watches.
              The hydrothermal transport method uses a large autoclave, an electrically heated, pressure-sealed container 3 meters or more in height. The autoclave contains an aqueous solution of sodium carbonate or hydroxide. Small fragments of quartz are placed on the bottom as the source material. The upper portion of the container is a cage supporting numerous small seed crystals of quartz. When the temperature is raised to about 400 degrees centigrade, the quartz fragments dissolve and crystallize onto the seeds in the cooler upper portion of the container.
              Synthetic Hydrothermal Citrine QuartzThis method was designed to produce colorless quartz for industrial applications. But it can also be used to grow quartz for gemstones, particularly when large sizes or well-matched sets of uniformly colored stones are needed. It is also possible to grow synthetic quartz in colors not found in nature, including unusual multicolor combinations.
              Though the synthetic quartz is real quartz -- composed of crystals of silicon dioxide just like natural quartz -- reputable gem dealers will not sell this material unless appropriately identified. In many cases it can be difficult to distinguish the synthetic material, but gemologists can usually identify the presence of seed crystals in synthetic quartz. Untwinned crystals are also a mark of synthetic amethyst, though it is now possible to produce twinned crystals by the hydrothermal method.
              Synthetic Hydrothermal Amethyst QuartzThe best way for consumers to identify synthetic quartz is by size, color and clarity. You will often see synthetic amethyst or citrine in extraordinarily large sizes with perfect clarity. Natural amethyst or citrine will typically exhibit color zoning that you won't find in the synthetic material. The synthetic ametrine is often found in colors that you won't see in nature; either the color is extraordinarily vivid, or you will find hues such as blue and green which do not occur naturally.
              Last edited by admin; 30-10-09, 11:40. Reason: Removed external links
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              • #8
                Thanks, Janet, for all this info - it's really interesting. Pardon the pun, but you really are a mine of information! :D
                Yesterday I was clever and wanted to change the world.
                Today I am wise and am changing myself.

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                • #9
                  I guess it comes with the territory of being a typical curious Gemini! It's driven my mom & hubby nuts over the years! Gran always phones me when she's stuck with crosswords too, and I just love general knowledge quizzes (although I have become a bit rusty around the edges lately!).
                  Click here for great deals!

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                  • #10
                    I must have gemini traits then.. :-)
                    What's for sale today?

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                    • #11
                      That makes two of us and with the same name!? Heaven help everyone out there!! lol
                      Yesterday I was clever and wanted to change the world.
                      Today I am wise and am changing myself.

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                      • #12
                        Hi All,

                        Going off topic...
                        bidorbuy Forum Administrator



                        bidorbuy.co.za - Africa's largest market place.
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                        • #13
                          Sowi Admin - I'll start on the rocks again soon!

                          :p
                          Click here for great deals!

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                          • #14
                            My apologies, too, Admin Team! (Sometimes it's just so easy to be naughty!)
                            Yesterday I was clever and wanted to change the world.
                            Today I am wise and am changing myself.

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                            • #15
                              Hi, thanks guys especially Cali Craft for that info !

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