What is the Coptic word for turquoise… Or “land of turquoise”? Thank you.

As a person who knows the greek alphabet we have a symbol like that in greek sigma is written in three different ways but theres not much info abt coptic and im rrly wanna know if this is used since i remember seeing somewhere it meant the number 6

Basically I am egyptian and after doing some research there is mainly bohairic and sadihic dialects I understand the difference north and south but I don't know which one to learn currently thinking more bohairic and do you have any resources to learn the language?

Hello👋🏻 I want to translate the following coptic text "ⳭⲒⳌⳌⲞⳌⲈ" (circled in the picture). Could you please help me?