Most gemological authorities count on a medium to medium dim-crimson colour tone in the ruby. Stones lighter than this are known as pink sapphire. On the other hand, there is no general agreement on how to draw the line among rubies and sapphires. It’s normally one stone in 1,000,000 of https://andersonwlxlv.wikiinside.com/1105536/luxury_gemstone_jewelry_an_overview