Noordelijke zwerfstenen met topaas
Grondboor & Hamer , Volume 26 - Issue 2 p. 65- 67
A description is given of two rocks, found as erratic blocks in the Netherlands, both containing a considerable amount of topaz. The autor has tried to find out the origin of these rocks. Although the correspondence with descrisptions of some topaz-bearing rocks from the S.W.-part of Finnland is not complete, it seems probable that the origin has to be sought in that direction.
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