1,031 followers
RT @AsFarce: We have evidence of copper smelting from malachite in Botswana going back 1200 years! "...with two exceptions, all modern copp…
RT @AsFarce: We have evidence of copper smelting from malachite in Botswana going back 1200 years! "...with two exceptions, all modern copp…
RT @AsFarce: We have evidence of copper smelting from malachite in Botswana going back 1200 years! "...with two exceptions, all modern copp…
RT @AsFarce: We have evidence of copper smelting from malachite in Botswana going back 1200 years! "...with two exceptions, all modern copp…
RT @AsFarce: @MineralCup more on precolonial malachite mining and copper refining in Botswana https://t.co/pbRVbj3hTc