ϧⲁⲓ (noun)
(noun)
nitre
Crum: 630a
Dawoud: 628b

https://upload.wikimedia.org/wikipedia/commons/5/5c/Niter_from_Tarapaca%2C_Chile_%28cropped%29.jpg
https://upload.wikimedia.org/wikipedia/commons/4/48/Emi_Koussi_crater_natron.jpg
ϧⲁⲓ
Crum: 630
630
630

Dawoud: 628b
628
628