It's Millesimal fineness , if an alloy containing 75% gold, then denoted as "750". Please refer to http://en.wikipedia.org/wiki/Millesimal_fineness
.9999 is 10 times purer (10 times less impurities).
With the exception of the .9999 fine Gold Buffalo $50 coin, all American Gold Eagles are 91.6% pure gold.
It's the purity of the gold, as a decimal fraction. .9999 means the ring is 99.99% pure. That surprises me a bit, though, because jewelry is normally not made of gold that fine because it would be too soft for normal wearing.
9999 gold necklace with a 9999 gold cross price tag
363 gbp
$ 270.10 as at 27/11/11
Gold that is stamped with ".9999" refers to the purity of gold. This particular number indicates that the piece is 99.99 percent pure gold.
1 Gram of .9999% of gold is curently worth $2500.00 considering.
24karat gold - pure gold
Visit a gold dealer.
More than 1000 Malaysian Ringits. 400 - 500 Canadian dollars
The mass of 9999 pure gold you get from 1 gram of gold ore is minute. For example, 30g of gold can be extracted from an 860kg block of gold ore.