- Onyx is the parallel-banded variety of chalcedony, a silicate mineral. Agate and onyx are both varieties of layered chalcedony that differ only in the form of the bands. Onyx has parallel bands, while agate has curved bands. The colors of its bands range from black to almost every color. Specimens of onyx commonly contain bands of black or white or both. Onyx, as a descriptive term, has also been applied to parallel-banded varieties of alabaster, marble, calcite, obsidian, and opal, and misleadingly to materials with contorted banding, such as “cave onyx” and “Mexican onyx”.
- Central District, Seattle (Wikipedia)
The Central Area, commonly called the Central District or The CD, is a mostly residential district in Seattle located east of downtown and First Hill (12th Avenue and Rainier Avenue); west of Madrona, Leschi and Mt. Baker; south of Capitol Hill, and north of Rainier Valley. Historically, the Central District has been one of Seattle’s most racially and ethnically diverse neighborhoods, and was once the center of Seattle’s black community and a major hub of African-American businesses.