2 Vintage opal mosaic triplet cabochons, an oval at about 17.88 x 13mm and a rounded corner square shape at about 14.45m with multi-colored opal pieces. Both have the black backs, oval is thicker at 2.1mm, the square at about 2mm. Both in nice shape, slight surface wear, backsides old glue reside and the square has chips on the edge of the black background. Perfect for projects or re-purposing. Ask questions and look at my pictures.