AWESOME LARGE 36,2CT ORANGE CITRINE GEMSTONE WITH BEAUTIFUL OVAL CUT NATURAL
WHAT A LOVELY GEMSTONE WHICH WILL MAKE FOR AN EXTRAORDINARY ENGAGEMENT RING! AN AWESOME LARGE 36,2 CARAT ORANGE CITRINE GEMSTONE WITH A BEAUTIFUL OVAL CUT. COMES WITH A BEAUTIFUL PERSPEX PRESENTATION CASE AND VELVET BAG.
THIS PARTICULAR STONE WAS BOUGHT INN 2011 FROM A SELLER IN CAPE TOWN WITH THE ORIGEN OF THE STONE INDICATED AS BRAZIL. IT HAS A VVS (EYE CLEAR) CLARITY WHICH MEANS IT IS FREE OF INCLUSIONS AS SEEN WITH THE NAKED EYE WHICH IT APPEARS TO BE. IT WAS ALSO SOLD AS A NATURAL UNTREATED MADEIRA CITRINE GEMSTONE. HOWEVER AS WILL BE EXPLAINED BELOW I THINK IT IS A HEAT TREATED CITRINE GEMSTONE AND QUIT POSSIBLY EITHER A HEAT TREATED TOPAZ OR SAPPHIRE GEMSTONE AS INDICATED BY THE ORANGE UV AFFECT SEEN (PLEASE SEE PHOTO). THESE STONES TOGETHER WITH SCAPOLITE ARE SOMETIMES MISTAKEN FOR CITRINE AND SOLD AS CITRINE. SINCE BRAZIL IS ALSO A MAJOR SUPPLIER OF TOPAZ BUT NOT OF SAPPHIRE IF THIS STONE IS INDEED MISIDENTIFIED IT WOULD PROPABLY BE A HEAT TREATED TOPAZ.
TESTS PERFORMED: SCRATCH TEST: IT DID SCRATCH A GLASS WINDOW PANE WHICH WOULD INDICATE IT IS HARDER THAN GLASS. (MOHS HARDNESS CITRINE 7.0-7.5 GLASS 5.5-6.5 TOPAZ 8.0 SAPPHIRE 9.0)
UV LIGHT TEST: ORANGE REACTION WHICH WAS UNEXSPECTED. (THE UV LIGHT HIT THE ELECTRONS. THEY JUMP AND FALL BACK. THEY RADIATE LIGHT OF A CERTAIN WAVELENGTH WHEN THEY DO WHICH IS SPECIFIC TO EACH ELEMENT IN THE MINERAL. THIS IS CALLED FLUORESCENCE.) ONLY 10% OF GEMSTONES EXHIBIT A FLUORESCENCE AFFECT LIKE RUBIES, SAPPHIRE, TOPAZ, OPALS AND DIAMONDS. GLASS AND ALL NATURAL QUARTZ VARIETIES INCLUDING CITRINE DOES NOT SHOW A UV AFFECT. LAB GROWN CITRINE UVS BLUE LIGHT. YELLOW TOPAZ HOWEVER SHOWS A YELLOW TO ORANGE REACTION UNDER UV LIGHT. (Topaz is often treated with heat or irradiation to make it a deep blue, reddish-orange, pink etc) YELLOW TO ORANGE SAPPHIRES NATURAL (HEAT TREATED OR UNTREATED) ALSO FLUORESCE ORANGE WHILE SYNTHETIC ORANGE SAPPHIRES FLUORENSCE RED. ALMOST 99.9% OF ORANGE SAPPHIRES ARE HEAT TREATED. SCAPOLITE FLUORESCES RED UNDER UV.
GEMTESTER TEST: NO GEMTESTER TEST PERFORMED. (These testers separate gemstones from one another based on their thermal conductivity or the rate at which electricity or heat transfers through the stone and are very accurate.)
SIZE: 21,8 x 12,5mm
DISCLAIMER: I AM NO GEMSTONE EXPERT. THESE GEMSTONES BELONGED TO A FAMILY MEMBER THAT HAS PASSED AWAY. HE COLLECTED GEMSTONES DURING THE EARLY TWENTY FIRST CENTURY MANY WERE BOUGHT ON EBAY AND OTHERS BY TRAVELLING TO OTHER COUNTRIES. I HAVE TRIED TO VERIFY AS FAR AS POSSIBLE ANY STATEMENTS OR CLAIMS BY DOING SOME RESEARCH AND PRELIMARY TESTS ON EACH GEMSTONE. CITRINE: Citrine is the yellow variety of quartz, and
its name comes from the Old French word for lemon. The yellow colour is caused by traces of iron in the quartz. This occurs very rarely in nature, so most citrine is made by heat-treating other varieties of quartz - usually purple amethyst or smoky quartz, which are both more common and less expensive.
By applying heat to these gems, they turn from their original colour to a gorgeous shade of gold. Natural citrine is almost always a pale-yellow colour and commands a far higher price than the processed variety. The most sought-after citrine gemstones are a clear, radiant yellow-to-brownish-red colour, however this is particularly rare for naturally-occurring citrine. This rarity means that the natural stones that fall into this colour category have a particularly high price tag.
The most abundant sources of natural citrine are found in Bolivia, Madagascar, Mexico, Spain and Uruguay. Amethysts that are heat-treated to a golden colour are mostly mined in Brazil, although other sources include France, Russia and the US, specifically California, Colorado and North Carolina.
PLEASE ALSO SEE MY OTHER ITEMS LISTED. I HAVE SOME OTHER GEMSTONES ALSO ON AUCTION THIS WEEK.
