Gematria by kruasan

This is a concept album inspired by characters from anime/manga series Houseki no Kuni (Land of the Lustrous).
Each Gem has their own track and main instrument

Phos (フォス)
hardness: 3.5 (legs: 7; head: 5)
instrument: ?

Cinnabar (シンシャ)
hardness: 2
instrument: Violin

Bort (ボルツ)
hardness: 10
instrument: Synthesizer

Diamond (ダイヤモンド)
hardness: 10
instrument: Piano

Antarcticite (アンタークチサイト)
hardness: 3
instrument: Flute

Phos as album art, by Aspid:
https://www.deviantart.com/aspidart
https://twitter.com/Aspid_Art