Encyclopedia of gemstones

Sapphire: features and curiosities

Among the precious stones most famous worldwide, Sapphire cannot be missing, with its blue and sky-blue shades, loved since ancient times and believed to have miraculous powers. We have already me...

Emerald: features and curiosities

We have already learned about the history and features of the ruby: this time we focus instead on the emerald, a very important precious stone with an intense green color, greatly loved by Cleopat...

Ruby: characteristics and curiosities

Jewelry is not made only of precious metals like gold and silver, but also of precious stones. Among the many mineral varieties found worldwide, four precious stones stand out for their priceless v...

Guinness extraction: the largest amethyst in the world!

To this day, it remains the largest amethyst ever extracted in Uruguay: 15 whole tons of top-quality raw material worth several hundred thousand dollars. Twenty days of work were needed to extract ...