2 adjectives to describe tortoiseshell

If it can be avoided, never wash combs, as the water often makes the teeth split, and the tortoiseshell or horn of which they are made, rough.

Her face was like a plate of fine white porcelain, and the deep eyes filled it with a strange and magnetic pathos; the abundant chestnut hair hung in the precarious support of a thin tortoiseshell; and there was something unforgetable in the manner in which her aversion for the elder woman betrayed itselfa mere nothing, and yet more impressive than any more obvious and therefore more vulgar expression of dislike would have been.

2 adjectives to describe  tortoiseshell