See photos for markings in the glass. They appear to be “cracks” but I believe they are part of the design.

This beautiful art glass piece is perfect for any collector or lover of unique home decor. The rose brown champagne coloring adds a touch of elegance to this ashtray trinket dish. Crafted from high-quality glass, it is both durable and stunning. The unmarked brand adds to its mystery and intrigue, and the unknown country/region of manufacture only adds to its charm. Use it as an ashtray or a trinket dish, either way, it will make a wonderful addition to any home.