Hi Cathykeshi & Gemgeek, it's great to receive compliment!
Hi Frost Me, i got it from a local mall in Singapore. It's a shop that sell pearls and jadeites. The size of the pearls is about 6-6.5mm in 16 inches strand. Clasp will be 925 silver. The pearl do not look really that round. But it does looks good from normal distance.
This size/length lends itself very well to an enhancer pendant, if you are someday looking for idea for a future gift for this same aunt. My wedding pearls were 6mm and 16" and I wore them with an enhancer.