olya...
that isnt terrible, but it could be better.. Use INCHES in the descriptions also. Americans dont know metric.
bright red necklace, then you have Pendant. by itself....
I would write it
Bright red necklace, silver tree pendant, nature jewelry, tree branch pendant, tree of life jewelry,elegant necklace, silver tree necklace.
each of those 7 phrases is also its own tag, and each of them are what someone may type in when looking for that piece.