3 occurrences in 3 dictionaries
SARDIUS, ???, so called from its redness, Ex 28:17; 39:10; Eze 28:13; ???????, Re 21:20; a precious stone of a blood-red colour. It took its Greek name from Sardis, where the best of them were found.
the fifth of onyx, the sixth of sardius, the seventh of chrysolite, the eighth of beryl, the ninth of topaz, the tenth of chrysoprase, the eleventh of jacinth, the twelfth of amethyst.