The most famous green diamond is the "Dresden Green", an almost 41-carat
green diamond from India. It is named after the German city, the seat of the Saxon elector August III, also known as August the Strong. He purchased the diamond in the early 1740s. The stone only narrowly avoided the art theft of November 2019, when many valuable, historical pieces were stolen from the Green Vault in Dresden. Luckily, at this point in time it was being exhibited in New York.
Also very well-known is the "Ocean Dream", a bright, blue-green diamond, which was auctioned off in 2014 by Christies in Geneva, as part of the legendary "Magnificent Jewels" auctions. The 5.5-carat precious stone achieved an outstanding result of almost 8 million Swiss Francs, which at the rate of exchange at the time amounts to just over 7 million euros.
The majority of green diamonds are rather small, with examples weighing more than 1 carat very rare. The price for stones with a weight of one carat starts at around €45,000 for stones with a slightly greenish colour, whereas stones with a "fancy vivid green" colour can fetch €250,000 per carat without any difficulty. Unusual green diamonds, which are popular amongst collectors, can achieve even higher values.
In conclusion: unlike affordable green emeralds, green diamonds are only suitable for investors with considerable wealth.