They are signed on the back but I can't make it out.
Iris Glass: The main cabochons feature distinctive "iris glass" (often referred to as rainbow glass), which embeds stripes of pink, blue, and green directly into the clear glass matrix to mimic natural rainbow quartz.
Setting Style: Each main stone is secured in a brass, crown-style dog-tooth bezel.
Accents: A halo of clear, faceted rhinestones surrounds the main rainbow glass drops.
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