Rare 3.5″ Fossil Ammonite Collina gemma | Jurassic Toarcian Italy Pesavo | Genuine COA

Description This listing features a rare and well-preserved 3.5-inch fossil ammonite, Collina gemma, from the Toarcian Stage of the Early Jurassic Period, discovered in Pesavo, Italy. This is a visually striking and scientifically important ammonite with elegant ribbing and classic Toarcian features. The photo shows the exact specimen you will receive — scale cube = 1cm. See photo for full measurements. This ammonite is ideal for collectors, palaeontologists, and educational display collections. All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. Geological & Scientific Information: Fossil Type: Ammonite Species: Collina gemma Order: Ammonitida Superfamily: Hildoceratoidea Family: Hildoceratidae Geological Stage: Toarcian (approx. 182.7 – 174.1 million years ago) Biozone: Believed to fall within the Bifrons to Variabilis Zones of the upper Toarcian Period: Jurassic Locality: Pesavo, Italy Depositional Environment: Offshore marine basin, likely with low oxygen levels in deeper water, preserving delicate shell details in fine sediment Morphology & Notable Features: Moderately involute coiling with rounded whorls Dense, fine ribbing across the flanks, often bifurcating or trifurcating from the umbilical shoulder Clean and aesthetic symmetry — typical of Collina genus Suture lines well preserved in quality specimens Displays elegant form, with slightly compressed profile and detail ideal for scientific or display purposes Scientific Significance: Collina gemma is a biostratigraphically useful ammonite and a representative of the diverse and well-evolved Toarcian ammonite faunas of Europe. It aids in the correlation of Toarcian strata across western Tethyan margins and is especially well-known from Italian fossil sites. Its finely ribbed ornamentation and consistent morphological characteristics make it valuable for identifying zonal boundaries in the Toarcian stage. It was originally described in the 19th century as part of growing efforts to characterise ammonite faunas from Italy’s Jurassic marine strata. Ideal For: Dedicated ammonite and fossil collectors Academic or research collections Palaeontology and geology teaching specimens Natural history exhibits What You Will Receive: The exact fossil ammonite (Collina gemma) as pictured Certificate of Authenticity Professionally packed and shipped for secure delivery If you have any questions, we’re here to help. Let us assist in expanding your fossil collection with truly remarkable specimens from Earth’s deep past.