very good
The numbers are probably an indication of the purity of the gold. Pure gold is 24 carat but 22 carat, 18 carat, 14 carat and 9 carat are all common.
1 carat = 200 milligrams 1/2 carat = 100 milligrams
If you mean 1/4 carat, that is one quarter of a carat or 25 points (one carat = 100 points) .
A carat is a unit of weight used for gemstones. One third carat is the weight of the diamond.
Both versions of the description you give, 20 point and 0.2 carat mean that the stone is roughly one-fifth of a carat in weight.
The notation '1.64 carat' means that the diamond weighs 1.64 carats.
The descriptor '.45' usually documents the carat weight of a diamond: meaning 45/100ths of a carat, or nearly half a carat.
carat
0.25 means its the carat of diamond,meaning you have quarter of carat real diamond
If by "arrow" you mean "carat" (>) the carat means "greater than" and if underlined means "greater than or equal to"
14 carat gold.
14 carat gold.