LAZ'ULI. Lapis lazuli is a mineral of a fine, azure blue color, usually amorphous, or in rounded masses of a moderate size. It is often marked by yellow spots or veins of sulphuret of iron, and is much valued for ornamental work. It is distinguished from lazulite, by the intenseness of its color.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI