schiller

A lustrous colored reflection from certain planes in a mineral grain.

A peculiar, nearly metallic luster, sometimes accompanied by iridescence, observed on some minerals, as hyper-sthene, and due to internal reflection from microscopic inclusions: in some cases this is an effect produced by alteration.

The peculiar bronzelike luster observed in certain minerals, as hypersthene, schiller spar, etc. It is due to the presence of minute inclusions in parallel position, and is sometimes of secondary origin.

an altered variety of enstatite, exhibiting, in certain positions, a bronzelike luster.

A bronze-like lustre observed in certain minerals, such as hypersthene, due to the presence of minute parallel inclusions.

German romantic writer (1759-1805)