南洋真珠です。
This is a south sea pearl.
指輪に留めるために南洋真珠に穴を空けます。
まずは、穴を空ける位置に印をします。
The process of this time is to drill a hole in the pearl in order to set it into a ring.
At first, mark the position to drill a hole.
真珠の穴あけ専用の工具。
This is a specialized tool for drilling a hole in the pearl.