From a recent ASJRA newsletter:
It is purported that to create one 18k gold ring results in:
- 20 tons of mine waste
- another 250 tons of mine waste for a 1ct. diamond
- cyanide to separate the gold from the ore
- smelting to remove gold impurities (Smelters release upwards of 140 million tons of sulfur dioxide into the atmosphere annually.)
Thanks to Elise Winters for the info.