chestnut coal

chestnut coal

[′ches‚nət ‚kōl]
(geology)
Anthracite coal small enough to pass through a round mesh of 1 ⅝ inches (3.1 centimeters) but too large to pass through a round mesh of 1 13/16 inches (1.7 centimeters).
References in periodicals archive ?
It uses chestnut coal and has a blower on the back, but can run if the electricity goes out.