Aramis Antiques has dated this piece to the 1900s.
The silver bale is set with three old rose cut diamonds. Two gold petals inset with enamel adorn the verticals, the larger set with a central diamond, the smaller inset with a gold sphere. In all this piece holds 5 diamonds. The silver is unmarked, not unusual for small jewellery of this age. The silver chain is 17inches or 21.5 cm. The pendant is 2.25 inches or 6cm long. Very elegant and in good antique condition.
Aramis Antiques has dated this piece to the 1900s.
You can view the stock and full dealer information on the Aramis Antiques Profile Page