“Severalmaz” (“North Diamond”) is located in the Archangelsk region. Its operator, “Alrosa”, is the largest diamond mining company in Russia.
Way to the richest Lomonosov deposit
Diamonds were found in the Archangelsk region in 1980, the Lomonosov deposit turned out to be the largest in Europe. For 2012 its resources are 220 million carats (1 carat-0,2g), their cost is 12 billion dollars.
Diamonds are just common stones. Other than being very hard, nothing special at all about them. Don’t waste your money buying them, thinking they’re valuable. One day, the bottom will drop out of the market, and you’ll be left with rocks worth a couple bucks, that you paid hundreds or thousands for.
If you want to show a woman you love her (and must buy some sort of rock), then get a Sapphire or something.