ColorChallenge - Thursday Green - Old quarry.

Old quarry in the suburbs of Nizhny Tagil. Here in 1836 the largest block of malachite weighing 380 tons was discovered and mined. This malachite is decorated with columns of St. Isaac's Cathedral in St. Petersburg, many vases and other stone-cutting and jewelry items are made. Now the deposit is depleted and the extraction of malachite is stopped ...