Birch wood has a yel­low­ish white to red­dish yel­low col­or, which can also turn out almost white and dark­ens quick­ly. Birch wood from North Amer­i­ca is more yel­low­ish colour. The grain of birch wood forms bare­ly dis­cernible light lines and may occa­sion­al­ly be flamed. In addi­tion to the flamed grain anoth­er pat­tern may occur in birch wood called the «Eis­birken­muster» mean­ing «Ice birch pat­tern». This grain resem­bles frost flow­ers on a glass pane and is very pop­u­lar. The smoothed sur­face of birch wood has a silky sheen.