stone of the month
March 2019

texts and images from: Natural Stones Worldwide


A very coarse-grained, dark blue-grey anorthosite of the Precambrian period. It shows a very spectacular appearance of colours. First introduced at Helsiki in 1962, s.a. Arctic Blue.
Mineral distribution on the average: plagioclase: 81%, pyroxene: 10%, quartz: 4%, accessories: 5%.
Technical and physical characteristics: Bulk density: 2,780 kg/dm³, bending strength: 12,8 N/mm², compression breaking load: 215 N/mm², water absorption: 0,16%, frost resistant and polish constant.
Uses: Ornamental stone in- and outside.

The European Standard: EN 12440 "Natural stone - Denomination criteria" became effective at 2000, September 30th. In the "Synonyms" field of this database you will find the trade names of addendum A with the annotation (according to EN 12440, addendum A).

This stone internationally may be nominated as a granite. For the US- and Chinese market this is correct according to ASTM C 119 resp. GB/T 17670. But in the area of application of the European Standard (EN) this stone must be nominated as anorthosite because the EN 12440 demands a scientific terminology for the denomination of natural stones, determined with a petrografic examination according to EN 12407 and 4.2 of prEN 12670. In case of doubt please ask your supplier.

origin Finland (Nuijama, Ylaemaa - near the border to Russia - ); ?(Illijaervi, Laminpaeae, Ojamo too)
synonyms Finlandia Blau Spektrolit, Finlandia Blue, Finnischer Labrador, Labradorfels, Spectrolit, Spectrolith, Spectrolite, Spektroliitti, Spektrolite (according to EN 12440, addendum A), Spektrolith, Spektrolyt, Spektrolyth

"Spectrolite", quarry: Ylaemaan Graniitti Oy, FI-54410 Ylämaa/Finland; email:; web:;

"Spectrolite", quarry: Palin Granit Oy, FI-20101 Turku/Finland: email:; web:;

Spektrolit, sample slab

Spektrolit, microphotograph

Spektrolit, microphotograph
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