Available in a range of sustainably grown hardwoods from Europe and North America. Some of the most striking ones, such as rippled sycamore, are often only available from specialist suppliers of woods for musical instrument makers.
Others, particularly the Yew, are usually only available on an ad-hoc basis because larger timber merchants are not interested in a wood which exhibits so much stunning variation even within one small board. That of course, is what makes it so appealing to me, at least for the smaller items such as this.
Care;
After testing many finishes, I have only found one that still looks good after a glass has stood in red wine on it for half an hour. Even so, wipe spillages dry and do not put them in the dishwasher.
Clean with warm soapy water as necessary.
As with all things made of wood, every coaster is totally unique, but of course, some are “more unique” than others.