Sequence the steps involved in the making of the cast of a shell

1)First, prepares all the necessary equipment and material
2Creating the pattern that desired for the shell
3)Creates the core of the shell by pouring the hollow spaces with meta
4)Creates molds for the shell by filling the corebox with sands and let them combined over time
5)Shake out the sand after the combination already cooled down
6) cast results are finished.

This would be basalt, you see basalt is a naturally accruing element in the 5 stages of reoccurring stages so if you were to say coal you would kinda be right but not quite