A slice across a stalactite or stalagmite, with a blue-green centre surrounded by a thin band of light brown and then glittery purple amethyst crystal points radiating out. The specimen is discreetly glued to a black plastic stand. Do you know how to tell a stalactite from a stalagmite? A stalactite has to hold on tight to the cave ceiling, a stalagmite might reach the roof. Amethyst is a February birthstone.
1 1/16 inches (2.7 cm) wide, 3/8 inch (0.95 cm) deep and 1 1/8 inches (2.9 cm) tall.