1 1/4 inches long, 1/2 inch wide
Thank you for contacting Mearto with your appraisal inquiry.
This is a wonderful example of early 20th century jewellery design. Lavalier pendants are currently in vogue and are in high demand, they are also offered at auction fairly regularly. From the images provided, this piece is in good condition and there is no serious damage visible in the images provided. It is very likely the pearls are natural too.
A fair market estimation for a turn of the century pearl and diamond lavalier pendant would be between 500 - 700 GBP. This estimate is based on actual recent past recorded auction sales of comparable items. Retail asking prices can be higher and may vary.
I believe this beautiful piece would easily achieve within the estimate provided, however, there is no measurement for the sentimental value you might attach to the pendant.
Do let me know if you have any additional questions. Many thanks!