General and specific topics on gemstone color and the issue of buying them online are provided below. 

Ruby Color discussion

• https://www.buygemstone.info/2014/02/28/how-much-does-it-cost-to-buy-natural-burma-ruby-in-bangkok-thailand/
• https://www.buygemstone.info/how-much-does-a-one-carat-ruby-cost-video/

Emerald Color discussion

• https://www.buygemstone.info/2015/02/17/how-much-does-it-cost-to-buy-a-1-to-3-carat-untreated-no-oil-100-natural-emerald-from-zambia/

Blue Sapphire Color discussion

• YouTube - https://www.buygemstone.info/2019/02/14/how-to-determine-a-value-of-blue-sapphire-based-on-4cs-plus-ot-a-buying-guide-video/

General Issue in Buy Color gemstones online

• https://www.buygemstone.info/buy-gemstones-online-safe-or-unsafe/

We will be writing a blog post soon about blue, yellow and padparadscha, teal hue, etc., so do stay tuned.

If you have any questions or comments do feel free to ask here and we will try to answer them as soon as possible.