|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
GEM TYPE: TOUCHSTONE BEAD, HOLE DRILLED FOR NECKLACE.
WEIGHT: 16.45 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.
Purchased Sep. 20th...arrived Oct. 4th. Great considering it came from overseas with only $5 for shipping. Item was exactly as described and neatly packaged.BEAUTIFUL OVAL FACETED EMERALDS 1.11 CTS 90197
|Starts||17th Oct 2017 8:00pm PDT|
|Ends||22nd Oct 2017 8:00pm PDT|
|Registered Shipping||$19.00||10 Days|
|Standard Shipping||$4.00||21 Days|
|Shipping Insurance all providers $7.00 (optional)|