ruby (gem)
Ruby is a gemstone, a variety of corundum (aluminium oxide) which has a chromium impurity which gives it a pink, red or crimson colour. It is used as jewelry.
This tag implicates gem (learn more).
Ruby is a gemstone, a variety of corundum (aluminium oxide) which has a chromium impurity which gives it a pink, red or crimson colour. It is used as jewelry.
This tag implicates gem (learn more).