The first laser was made with a rod of synthetic ruby.

Most synthetic rubies originate from flame fusion, due to the low costs involved.

In the 20th century, synthetic ruby or sapphire becomes universal for jewel bearings.

It is also used in the production of synthetic rubies.

In the middle, glowing transparently red, was a large synthetic ruby.

The images were multiplied by the facets of the synthetic ruby behind which the lens had been hidden.

Depending on the concentration of the dopant, synthetic ruby usually comes in either pink or red.

Two years later, another student committee replaced the blue stone with a synthetic ruby.

He wondered who had made it and whether they would make a similar one for him, only with synthetic rubies instead of emeralds.

I found an old professor who could turn out synthetic rubies.