… Precious stones (other than diamonds) and semi-precious stones, whether or not worked or graded but not …
Explanatory notes
… 71.03 - Precious stones (other than diamonds) and semi-precious … watches or in tools or, because of their hardness or other special properties, for other industrial purposes (e.g., … stones which, although belonging to the mineral species cited above, are of non-precious varieties, or of a quality …