Alexandrite: the color-change chrysoberyl gemstone Alexandrite Alexandrite is a rare variety of chrysoberyl noted for its dramatic color change under different light sources; valued in jewelry and collected for its rarity and gemological inter…
Aquamarine (gemstone) Aquamarine Aquamarine is the blue‑green variety of beryl prized as a gemstone. Noted for its sea‑like hues, clarity and durability, it is the traditional birthstone for March and a popular je…
