Chain necklace 925 17-18", cross silvertone pendant Blue Stone CZ Cross 1.5"

This is a necklace with a silver chain Mark 925 and is 17 to 18 " in length. The pendant is a silvertone cross with a blue Center Stone with a mark CZ and Thailand. I can not find a 925 mark on the cross, so it is not silver as far as I can tell. The cross and the necklace came together and were pre-owned. They are in good condition, consistent with their age, wear, and prior use. 501