I highly doubt it's diamonds. o_o
Like, seriously, get real.
At the most, fake diamonds.
Japan has this love for decorating
anything and
everything with fake jewels and such.
AWESOME HOUSE BTW~~~~~!!!
\
(Whoever's house it may be)
And one more thing: Ayu once said on Domoto Kyoudai that she had this cushion-like material on her floor around the house. I don't see that in these pics though.