Marble

Marble was a hardstone widely used in the Realms as a building material. Marble was sometimes called calcite because that was its primary ingredient.

Description
Marble was highly prized in construction because of its strength, weight, and beauty. It came in many colors, including black, gray, pink, and white, and polished to a reflective smooth finish. This material was extremely heavy but was easy to quarry to exact specifications. A typical price was 3 gp per pound (0.45 kg).

Trivia
The lesser deity Vhaeraun was known to occasionally send black marble to show his favour or disfavour to his followers.

Uses
The Great Library of Mezro in Chult had a facade of rose marble.

Idols of the snake god of poison Llash were cubic black marble carvings of three-headed snakes.

Powers
No magical use for marble has been found.