Islamic pendant with Islamic calligraphy, 925 silver, Qajar/Ottoman. - Qajar dynasty (1796–1925)

Very beautiful antique pendant in red agate adorned with Islamic calligraphy.
The engraved stone is about 200 years old. The calligraphy, executed by a master calligrapher of the Islamic world, testifies to the artistic refinement of that era, dated 1228 Hijri (1800).
The pendant is set in a 925 silver frame. The silver frame is from a different period than that of the engraved stone.
5 x 3 cm