Hello @Mathilde Brodeur, and thank you for choosing Abolos. To answer your question, yes the mosaic can be cut at its grout joints by using a pair of scissors or a razor. The glass itself can also be cut using a glass cutter.

Hope that helps! -Abolos

As you can see in the detailed picture below, the glass is on a mesh mount sheet, and scissors or blade can be used to cut the sheets, but you cannot cut the actual glass. Actual glass cuttign requires special care and tools, I would refrain from doing so especially because these are so tiny. sognaretile.com