Rauma Lamullgarn is, in my opinion, a thinner version of Finullgarn. It has a similar twist to Finullgarn, as opposed to the tighter twists of Gammelserie and Vandre, but is significantly thinner. A 50-gram ball of Lamullgarn has approximately 273 yards when the same weight ball of Finullgarn has 191 yards. Lamullgarn would be fantastic in fine colorwork and tighter gauges than Finullgarn is comfortable, with the same lofty character and feel of Finullgarn.
I knit two swatches in Lamullgarn. First, I knit a stockinette swatch in Color 28 and actually got exactly the ball-band gauge of 30 stitches to 4 inches on a US 1.5 (2.5 mm) needle. The swatch is solid, but still flexible and knitting it wasn’t straining. Second, I knit a colorwork swatch in Color 28 and Color 32 on a US 2 (2.75mm) and got 28 stitches to 4 inches. Even in low contrast colorwork like between 28 (terracotta) and 32 (burgundy), the stitches are well defined but not overly so, and the motif is clear and distinct.
I’d recommend Lamullgarn for any pattern that calls for Jamieson & Smith 2ply Jumper Weight. I’m often asked if you can use Finullgarn for J&S 2ply Jumper Weight patterns, but it’s generally a bit too thick. Lamullgarn solves that problem! It’s all the things you love about Finullgarn, but in a thinner yarn that works perfectly in all those detailed colorwork patterns. I haven’t tried it yet, but I’d also guess that you could actually knit it with J&S with good results!