5.11ct Natural Royal Blue Sapphire
PRODUCT ID: SP027
SIZE(WxLxH): 12.2 x 10.5 x 3.9 mm.
CLARITY: Medium quality with Inclusions Becoming More Prominent to The eye.
TREATMENT: Cobalt-Coloured lead Glass
HARDNESS(Mohs scale): 9
:: I only use Poslaju, Please allow to add (RM6 for SARAWAK) ,(RM8 for SABAH) and (RM10 for West Malaysia)
:: Tracking number will be provided once posted.
:: Allow 4 business working days to arrive within Malaysia,Not Including Holidays and frist Saturday
:: Bank Transfer: Maybank2u (A/C: 111234141030 ),CIMB (A/C: 11030049576525) ,RHB(A/C: 11101600306392)only
:: Please SMS me for the bank account info.
:: After bank-in the payment, please send me the transaction ID, date, time & amount, together with your name, address & contact no.
::YOU MUST CONTACT US FOR DETAILED RETURN INSTRUCTIONS.
:: You may return any item as above refund within 3 days of receipt!
:: The item must be in original condition. We cannot refund damaged items.
:: 30% RESTOCKING FEES! Shipping cost is Non-refundable!
:: Allow us take 1-2 days for us to check the items carefully. Refund will be given as FAST as we can
What is Lead Glass Filling?
Lead Glass Filling. Filling the fractures inside the GEMSTONE with lead glass (or a similar material) dramatically improves the transparency of the stone, making previously unsuitable GEMSTONE fit for applications in jewelry.The process is done in four steps below:
1. The rough stones are pre-polished to eradicate all surface impurities that may affect the process
2. The rough is cleaned with hydrogen fluoride
3. The first heating process during which no fillers are added. The heating process eradicates impurities inside the fractures. Although this can be done at temperatures up to 1400 °C (2500 °F) it most likely occurs at a temperature of around 900 °C (1600 °F) since the rutile silk is still intact.
4. The second heating process in an electrical oven with different chemical additives. Different solutions and mixes have shown to be successful, however mostly lead-containing glass-powder used at present. The gemstone is dipped into oils, then covered with powder, embedded on a tile and placed in the oven where it is heated at around 900 °C (1600 °F) for one hour in oxidizing atmosphere. Like orange colored powder transforms upon heating into a transparent to yellow-colored paste, which fills all fractures. After cooling the color of the paste is fully transparent and dramatically improves the overall transparency of the gemstone
Last Updated @ 1/12/2016 9:15:35 PM
|Question & Comment|