Hi all! I am very new to the pearl community. I have been increasingly interested in pearls ever since I inherited this beautiful set from my grandma. We are originally from the Philippines and was told this is a Philippine Sea Pearl. It passed all test except the grit test. Very cold to touch & adapts easily to warm body temperature. No visible hallmarks but are set in 14k gold with authentic small diamonds all tested to be real. I am just wondering why there is no grit at all when rubbing them. I am attaching some pics. Hoping to get some help from the experts. Thanks in advance.