I was checking out on some cajons, and found the Meinl Artisan Buleria Cajon. On its specs, I found that its body is made of birch, yet its frontplate is of 'Lava Burl'. What is this about? Is it a specific type of wood?
In the case of Meinl,the short answer is that 'lava' refers to a colour and not a timber. The timber is most probably what Meinl calls 'siam oak', which is rubber wood. If you go through the Meinl site, you will see terms like 'desert burl' and notice that the timber is , once again, 'siam oak'.