Perisphinctes sp. Ammonite – Collector’s Specimen with Calcite Crystals This well-preserved ammonite, identified as Perisphinctes sp., represents a classic Jurassic marine cephalopod with a beautifully defined spiral and pronounced ribbing characteristic of the genus. The specimen is largely free from matrix, allowing clear appreciation of its three-dimensional form and natural morphology. The surface displays warm earthy tones ranging from ochre to reddish-brown, highlighting the fossil’s texture and structural detail. A particularly notable feature is the presence of calcite crystals within the body chamber (“mouth”), where natural cavities have been partially filled during fossilization. These crystalline formations add contrast and visual interest, enhancing the specimen’s overall character. The combination of strong sculptural form, natural coloration, and crystalline development makes this ammonite both an appealing display piece and a meaningful addition to a fossil collection. A refined and authentic example of Jurassic marine life, appreciated for both its aesthetic qualities and geological history.