Here is a magnificent Sterling silver ring by the Danish modernist master silversmith Niels Eirk From (see bio). The ring features a very large, polished flat stone, which I beieve is jasper. As shown, the ring has a split band, and will therefore adjust to almost all finger sizes.
Condition: Excellent, clean, no visible damage, tiny chip at one end visible only on magnification
Marks: N.E.From (in script) 925, Sterling, Danmark
Size: adjustable - currently resting at finger size UK N, US 7, Eu 54. Top of ring is 3 cm (1.2") long and 2.5 cm (1") wide