4 Black and gold small buttons vintage for sewing crafts jewelry hc2531

This is a loose lot of 4 matching plastic buttons. They look like black onyx set in a braided gold frame but are all plastic, two piece construction. They are 5/8 inch.They have self shank backs for attaching. Perfect condition. No idea as to age. I think these buttons would work in a button bracelet beautifully.
Please note that button purchases can be combined to save on shipping. At least 3 lots,often more, will go for the one shipping rate. I automatically give refunds when lots are combined.