gir denotes chalk in the image of altar stones being shattered.

The attested use places gir in the comparison of altar stones with shattered chalk stones.

1. Chalk in shattered-stone imagery · dominant

   In Isaiah 27:9, the masculine singular absolute noun occurs in the clause comparing all the altar’s stones to shattered chalk stones; the APB renders the image as “like shattered chalk stones.”

   Isaiah 27:9

In the Anselm Project Bible: In Isaiah 27:9, the APB presents the term within the image “like shattered chalk stones,”.