Opal regardless of gram

Calculated in carats

Only those below 5ct,

Ordinary white opal is 200-300 .

The better ones are 400-500,

Fire opals are more expensive,

but there are many fire opals that have no color,

Currently the most expensive ones are black opal,

red>blue>green.

Basically 2000,

The solid color ones are less than twice as expensive