Very fast - thanks!!! AAA
|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
GEM TYPE: TOUCHSTONE BEAD, HOLE DRILLED FOR NECKLACE.
WEIGHT: 17.60 CARATS
SIZE: 24 X 13 X 10 MM
A TOUCHSTONE IS A SMALL TABLET OF DARK STONE SUCH AS FIELDSTONE, SLATE OR LYDITE, USED FOR
ASSAYING PRECIOUS METAL ALLOYS. IT HAS A FINELY GRAINED SURFACE ON WHICH SOFT METALS LEAVE A
DRAWING A LINE WITH THE GOLD ON THE TOUCHSTONE WILL LEAVE A VISIBLE TRACE. THE TRACE WILL
REACT DIFFERENTLY TO SPECIFIC CONCENTRATION OF NITRIC ACID, THEREBY IDENTIFYING THE QUALITY
OF THE GOLD. THUS 18 CT PURITY IS NOT AFFECTED BUT 14 CT GOLD WILL SHOW CHEMICAL ACTIVITY.
Very, very pretty stone and a great asset to my fledgling gem collection. It makes a statement!!! Well packaged and quick shipment... thank you!
Waw! I just received this beatiful Emerald and i am very satisfied buying this nice stone at a good price and still be able to make a beatiful piece of juwelry letting peoble taste a bit of the amaxing emerald at an affordable price. Thankyou so much.
|Starts||1st Feb 2010 7:11pm PST|
|Registered Shipping||$15.00||14 Days|
|Standard Shipping||$5.00||28 Days|
|Shipping Insurance all providers $7.00 (optional)|