I'm debating between these 3 sapphires for a center stone for my engagement ring. Thoughts on quality? I like the violet/purple stones that change colors in different light, but I also like the light blue sapphire. Thanks in advance!
http://www.earthstreasury.com/product/1-45-carat-blue-violet-pink-color-change-montana-sapphire/
http://www.earthstreasury.com/product/1-65-carat-robins-egg-blue-unheated-montana-sapphire/
https://gemfix.com/gems/sapphire-fancy-15-1404
http://www.earthstreasury.com/product/1-45-carat-blue-violet-pink-color-change-montana-sapphire/
http://www.earthstreasury.com/product/1-65-carat-robins-egg-blue-unheated-montana-sapphire/
https://gemfix.com/gems/sapphire-fancy-15-1404