'"Ring" in if you know that this gem is the hardest substance found in nature'
a diamond
GEMS & JEWELS: Ring in if you know that this gem is the hardest substance found in nature
"Ring" in if you know that this gem is the hardest substance found in nature
"Ring" in if you know that this gem is the hardest substance found in nature
GEMS & JEWELS
a diamond
GEMS & JEWELS