Obsidian and Sloe

Obsidian noun - Acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces.

Sloe and obsidian are semantically related in black topic. In some cases you can use "Sloe" instead an adjective "Obsidian", when it comes to topics like dark.

Sloe noun - A thorny Eurasian bush with plumlike fruits.

Obsidian and sloe are semantically related in black topic. You can use "Obsidian" instead an adjective "Sloe", if it concerns topics such as dark.