Friday, November 27, 2009

New Jewelry: Swedish Blue Slag Ring

swedish blue slag ring sterling
Another cabochon from my Russian dealer!

This one caught my eye immediately and I had no idea what the stone could possibly be. An incredibly bright blue, but not quite the right shade to be turquoise. I was told that it was "Swedish Slag" and came from foundries in Sweden. I bought it (and I should have bought more!) and did a little research on it.

The blue stone is actually 500-year old glass from Sweden. But it didn’t start that way. It began its life in the 1400's when metal smiths would dump the waste product from iron they were smelting. This sludge or slag which they dumped outside their shops would accumulate in piles which got buried for centuries. During that time it changed into this glass-like stone which is now being mined. Different minerals or metals would make the slag different colors. This one was probably contaminated with cobalt, creating this lovely blue color.

swedish blue slag sterling ringSo wearing this ring means wearing the ultimate in recycling. 14th century sludge on your finger!

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