Even the purple one can be used to make this.
My mom would say the expression "then il iruntha pala cholai" meaning, the brinjals taste as good as a jackfuit soaked in Honey! whenever she made this.
I have made this in a Kal Chetti. This is a vessel carved out of a single stone.It is made of a stone called soap stone We used to play with this stone, by using it like a chalk. This has to be cured before using. This particular one I made the gravy is my mom's/
Here is my collection of this utensil
You can read more about this or buy some modern versions here.
As you can see, I have to cure the last two, but the three on the left side,are well used.
Food prepared in this stays hot for a long time. Vetha Kuzhambu, Spinach Kootu, Any Kootu tastes exceptional.
I have some storage jars, in which I store some fresh pickles....