07/25/2026
Tonight, we're wrapping up the month of July with a new segment we plan to share every month: Diamond Deb's Gemstone Download. Deb has been in the jewelry business for more than four decades and is a wealth of gemological knowledge. She loves sharing that knowledge with our customers, and we know many of you enjoy learning the fascinating details behind the gemstones you wear. This month's download focuses on rubies.
Interestingly, rubies and sapphires are actually varieties of the same mineral: corundum. If corundum is red, it's classified as a ruby. If it's any other color, it's considered a sapphire. The rich red color of a ruby comes from trace amounts of chromium, which also gives many fine rubies their beautiful natural fluorescence.
In 2022, one of the world's most remarkable gem-quality rubies was discovered at FURA's ruby mine in Mozambique. Named the Estrela de FURA (Portuguese for "Star of FURA") the finished gemstone weighs an impressive 55.22 carats and is celebrated for its vivid red color, exceptional clarity, and striking fluorescence.
In 2023, Sotheby's auctioned the Estrela de FURA for $34.8 million, setting the world record for the highest price ever paid for a ruby at auction. Check out this incredible "star" below!
At Two Sisters, we offer a beautiful selection of ruby jewelry and can also help you design your very own custom piece: whether it's a ring, pendant, or another timeless treasure. We hope you enjoyed learning about rubies, and we look forward to seeing you in the store soon!
