Chalcedony is one of the world`s oldest gemstones. According to archaeologists, humanoids have worn stones, ivory, bone, and certain organic items for personal adornment for about 75,000 years. Which shows its power. Chalcedony prevents from touchiness and melancholy. Worn by many to promote calm and peace. Chalcedony also stimulates creativity. Which is mostly used by astrologers.
Tereschenko Diamond: While the Tereschenko Diamond was known to be in existence for 100 years, it wasn't known by most of the world until it went on auction in 1984. It was part of the Tereschenko family as a loose stone until it was set in a diamond necklace by Cartier in 1915. Just after its completion and right before the Russian Revolution in 1916 the stone was removed from the country for safekeeping.