Yes, rubies are used in some LASERs. These LASERs are (not surprisingly) called ruby LASERs.
A diamond ring is composed of a diamond or multiple diamonds, and a metal band.
Aluminium oxide and Corrundum
The main component of rubies is the mineral corundum.
Rubies are part of the corundum mineral group.
It is a strand of rubies
Rubies are a gemstone. Unless the cat is wearing a collar that is decorated with rubies, no cats do not have rubies.
Uncut rubies are worth more than cut rubies
the rubies density is a 4 on the density scale
Rubies of Eventide happened in 2003.
you have to go to mimi and give her the rubies
Quite a few rubies, but still an ounce.
Rubies of Eventide was created in 2003-06.
There are ruby mines in Africa.
As far as I am aware, rubies have been located in Montana and South Carolina, but I have not heard of rubies being located in Idaho.
Destroyer's Rubies was created on 2006-02-21.
Rubies are a color variant of the mineral corundum, which is an oxide.