When it is polished. Gemstones are rarely glassy when they're rough.
Glassy may be one word you could use to describe a diamond gemstone.
a gemstone
Peridot typically has a glassy and transparent texture. It may also appear slightly rough due to natural crystal formations within the gemstone.
Corundum is transparent as a mineral, especially in its gemstone forms such as sapphire and ruby. The level of transparency can vary depending on the quality and any inclusions present in the crystal structure. In general, corundum is prized for its transparency and clarity when cut and polished as a gemstone.
Garnet typically has a smooth, vitreous texture. It is a hard and durable gemstone with a glassy luster when polished, making it a popular choice for jewelry.
A hard colorful mineral with a brilliant or glassy luster is likely a gemstone. Gemstones are prized for their beauty and often used in jewelry due to their vibrant colors and reflective qualities. Common examples include diamonds, rubies, sapphires, and emeralds.
It is glassy.
Ruby (corundum) has a vitreous or glassy luster.
Classy rhymes with glassy! Really? that's your question? wow.
Glassy-winged sharpshooter was created in 1821.
Elongate glassy perchlet was created in 1822.
Indian glassy fish was created in 1822.