What is curly or masur birch

Curly or masur birch is a low-growing tree with a knotted trunk. Its patterned and wavy grain becomes strikingly captivating when polished. However, curly birch is rarely found in nature.

Among Estonians, this tree is known primarily as “maarjakask,” “karjala kask, Elsewhere in the world, curly birch is known as Karelian birch, masur birch, birch burl, and in Sweden as masurbjök, and in Finland as visakoivu. Nevertheless, many recognize it by its more widespread name, Karelian birch.

As a stout, low-growing, or crooked tree with strong branches resembling an apple tree, it is often found in sparse or unevenly composed forests, wooded meadows, stone fences, and former pastures.

what is curly or masur birch

Curly birch also commonly grows on limestone and gravelly beach ridges or on waterlogged soils, often appearing as a multi-stemmed, bush-like tree or shrub. The rare wood of the curly birch is dense and very heavy. At 12% moisture approx. 700-730 kg/m3.

What makes curly birch rare and unique?
Firstly, its wood is highly valued for its exceptional toughness, stunning patterns, and beautiful sheen. These qualities make it ideal for crafting durable knife handles, luxurious pipes, and extremely expensive, exclusive furniture.

Secondly, it is relatively rare in nature. It is found only in Karelia, the Baltic Sea region, and some parts of the Baltics, including Estonia.

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