If the tray is to be sold....state that it is "chased",not engraved.
The stone is too abraded for cerium oxide to help.If it is a triplet and separating the stone would need to be replaced if you intend on...
Mineral oil is a bit thin,regular cooking oil would be better to fill the pits.You want something that fills the pits and leaves a smooth smooth...
Opal doublets and triplets have been around for more than 60 years.They give the look of high priced black opal at a fraction of the price.In the...
Does it have an open back or closed?
It is too abraded for just finger oil.The only thing which would work is sanding with 400 grit paper,600,and then re-polishing.Won't really help...
It is very abraded from wear and not from being stored in a vault.It also appears to be a triplet which the layers are separating,but it is too...
A good photo can tell you many things,but a gem tester can only estimate what a stone could be.Since it is a known opal,starting with a photo is...
Bank vaults can be very hard on opals.It would also depend on the type of opal in the ring"solid,doublet,triplet".Maybe best to photograph it and...
Alcohol will not harm opals.
Colored stones should be photographed against a white/light colored background.On my screen the stone looks like a dark colored citrine.
Looks like one of the Incan Gods.Could be gold but needs testing.
The niello is missing,a sunshine cloth won't really help but clean up the silver.
Looks like bog wood.
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