Hi Mosaic Girl. Thanks for your kind comments regarding our Mother-of-Pearl mosaics. With regards your question and the cutting of the mosaics, they can easily be done either dry or wet and you should take the same precautions as if you were cutting stone or glass mosaics, ie the wearing of normal safety gear. The mosaics are not harmful to health providing as with any material it is used in the correct manner. We do advise if dry cutting and as with any process incorporating dust, to wear a dust mask to prevent inhalation of unnecessary dust. The mosaics are not toxic.
With regards the cutting, the mosaics cut exceptionally well and do not splinter as can be the case with glass or stone. We recommend the use of diamond disc or similar as this gives a smooth, crisp cut.
There is a slight odour given off with the cutting, which can remind some people of being at the 'dentists' as the mother-of-pearl carries sum of the same properties as bone being it is produced from a natural material.
With regards 'fine' cutting to allow for taps and fittings, due to the nature of the product this can be done relatively easy after installation, with the likes of a Dremel or similar.
We hope this satisfactorily answers your questions but please let us know if you ever have any further questions.
Siminetti