King James Bible
King James Version (KJV)

Similar to cocherah; probably a (black) tile (or tessara) for laying borders with -- black marble.
see HEBREW cocherah
H5508. sochereth
[סֹחֶ֫רֶת] noun feminine a stone used (with marble) in paving (compare Assyrian si—ru, a precious stone, DlHWB 495); — סֹחָ֑רֶת Esther 1:6.