Ground and highly polished on both sides, this stunning original Marston marble cabachon is packed with ammonites (Promicroceras planicosta). The white film around each ammonite is the animal's original shell. This is one of the planet's rarest fossil materials. Jewellers have been doing beautiful pieces with this unique fossil which is approximately 200 million years old. Grade A Marston marble is excessively rare.
This wonderfully preserved calcified lower lias ammonite has been preserved within this small nodule. The nodule surface has been ground smooth and finally a high polish applied to reveal lovely detail and colours throughout. A unique gift item which is approximately 190 million years old.
A really nice piece of Stellare section which has been ground gem smooth and a high polish applied. Within each open chamber lies hundreds of tiny brown calcite crystals. The other side of the specimen still retains the original shell of this classic Lower Lias ammonite which is indeed quite rare. The specimen has a level base for upright display and would look fantastic on either glass or wooden shelving. Approximately 200 million years old.