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GEMSTONE MARBLES
BLACK ONYX
This is Black Onyx gemstone marbles. These gemstone marbles are exclusively designed for customers who has previously bought the Chinese Checkers chess set with classic glass marbles. The production of these gemstone marbles is from a different source other than the chess producer. This will ensure the gemstones are produced by competent persons in their trade.
While the same type of gemstone is classified into different gradings, I have specifically requested the gemstone producer to supply me with what they called the "A" grade product. These are the ones with the best quality and also the highest unit cost. There is also a further selection process when I collect these gemstone marbles: the gemstone producer manufactures more than my ordered quantity, so that I may pick the best among the best. These processes have minimized the possibility of defects in the gemstones, and also reduced variations between the same type of gemstone marbles.
THE TYPE OF SELECTED GEMSTONE
Black Onyx:
It is a rich-looking, affordable black stone. Oynx originated from Greek, meaning "claw" or "fingernail". It was used in Egypt as early as in the Second Dynasty to make bowls and other pottery items (see references).
Since ancient times, Onyx has been dyed to improve its color. The black onyx marbles supplied with this chess set has undergone color enhancements, as in many other black onyx gemstones you can find in the market.
A bit of unwritten story for black onyx: it is the anniversary gemstone for the 10th year of marriage. Black onyx is said to be able to help you change your erratic habits, and is considered as a powerful protection stone.
SPECIFICATIONS
Dimensions of gemstone pieces : approx. 14.0mm (0.55") in diameter
Weight : approx. 250g
Playing pieces : 10 pieces of Black Onyx with color enhancement (black)
Gemstone chemical composition : Silica (silicon dioxide)
Hardness in Mohs Scale : 7.0 (black onyx)
Index of refraction : 1.54 - 1.55 (black onyx)
Density : 2.65 - 2.67 (black onyx)
Transparency : translucent to opaque
Country of Origin : Brazil (black onyx)
Maintenance : protect gemstone marbles from harsh chemicals, extreme temperatures, scratches, and store them away from sunlight
Cleaning : wipe gently with a damp cloth
Packing : to be delivered in padded envelope
FREE SHIPPING!
You will enjoy FREE SHIPPING for this item. I will send this item at no cost to you by airmail, which takes about 15 days to 22 days to reach you. The delivery shall be via Hong Kong Post by international airmail.
IMPORTANT REMARK
The product in this listing page is one type of gemstone marble only. There are another 5 types of gemstone marbles listed in another listings. The Chinese Checkers chessboard is NOT INCLUDED! |