Part 1 of 5 in the series: Value Factors, Design, and Cut Quality of Colored Gemstones (Non-Diamond). This article discusses the major value factors that affect the price of a colored gemstone.
Gemstone Quality Guides, Stone Grades, Value - Shop LC
Avoiding Disappointment: Tips for Buying Gems Online (Listings & Photos), Part 1/2 : r/Shinypreciousgems
Gem Cutting Styles - Definitions
Natural Ruby Grading and Ruby Color Chart
Value of Sapphires - How much is a sapphire?, Blog
Factors in Colored Stones that Interact to Affect Value
Avoiding Disappointment: Tips for Buying Gems Online (Listings & Photos), Part 1/2 : r/Shinypreciousgems
見つけた人ラッキー unknown ダウン A'GEM
Colored Gemstone Value Factors
Colored Gemstones as an Alternative Investment
Gemstones prices: How much do different gemstones cost?, Blog