Just a question re the $90 opal ring ( gorgeous IMO) but you haven't stated what type of opal ie doublet,triplet etc Sorry if 'solid opal' is correct but I wouldn't understand that.

Foxette, a doublet is a slice of gem opal glued to a backing.

A Triplet is a backing, a slice of gem opal and a crystal top glued together.

Solid opal may have colour throughout, or a bar of colour on a colourless oopal background. If it is not glued together, it is still regarded as solid opal.

The seller has described the ring correctly.

Erica 😉