14k over 925 real diamond earrings

this is a pair of 14k yellow gold bonded over solid Sterling silver authentic diamond earrings. the small stones are authentic diamonds but I am not sure about the marquise cuts just because I don't remember and out diamond tester burned up in the house fire and we have to sell some more before we can get a new one. I absolutely remember testing the round stones but for the life of me I can't remember testing the marquise stones I don't know why they wouldn't be real diamonds because the round are real. the condition is excellent hardly worn and the are very well made by RS designs one if the best in China they usually only use real stones