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Blue Swedish cabochons?

I have heard of a light blue from Sweden. I cannot find any info on
it, does anyone have any info on this material and/or a picture?

Richard Hart G.G.
Denver, Co.


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A vendor in Quartzsite, a couple of winters ago, had some sky blue
cabs that he called “Swedish Blue”, if I remember right. He said
that it is a glass slag from antiquity that is found in one certain
spot in Sweden, and it is very hard to come by. Sorry, I don’t have
any pictures, but it was a uniform sky blue color.

Vicki K in SoCal

Comes from old iron ore slag.

Cheers, Hans

This is a decent example of the stone.

Swedish blue - this is a by-product of iron making in early 1800s.
It is slag from the melt. The material is glassy and shows flowlines.
Much of it is unusable because of the ash embedded in the material.
At one time, it was so common that it was used for fences and as
decoration on houses. Found today near Kiruna on the Norwegian
border, north of the Arctic circle.

If you go to my website -

you can see more material in the Scandinavian section.

There isn’t much of it easily available. I first found it in Tucson
about 10 years ago.

At one time, I did a number of Scandinavian shows, in costume. The
Norwegians have many wonderful stones, the Danes have amber, and
this is what I found for the Swedes.

Judy Hoch

Richard, I think the stone you are looking for is brought over from
Sweden by Judy Hoch. I think it is a created stone, gorgeous blue
with light blue/white swirls or high lights. I have made a few
pendants and ear rings with it and they always seem to receive
compliments for the wearer.


Richard: The material is referred to as Swedish Slag. It is the by
product of iron smelting from the middle ages to 1865 when the
Bessemer Process was introduced and the by-product changed. I used to
get cut stones from Sweden but you can find piles of this material
where old iron mines existed. The color runs from blue to blue/green
to green. I have found piles of this myself at several sites here in
the northeast. However, the sites I found are overgrown and I had to
brave tangles of vegetation, bugs and possibly snakes to get to them.
Also, no roads run directly to the sites I found. Had to hack my way
in with directions from very helpful people living in the area. Most
of the material is not usable…just thin, very sharp shards or
pockmarked. Also, you have to make sure you are not trespassing. I
have a pile of rough here in the office. Hope to get it cut one of
these days.