Top grade ammonite cabochon from Marston Magna, Somerset. Examples of this infamous Ammonite marble are becoming a rarity these days, since this isolated deposit is no longer productive or accessible to the collector.
Location: Marston Magna, Somerset, England
Age: Lower Jurassic, Lower Lias, Obtusum Zone - 200 million years old
Measurements: 4cm x 2.9cm
Weight: 10g
