With Goethite InclusionsQuartz ClusterMineral Specimen19.5 grams", you're describing a mineral specimen featuring a quartz cluster with both fluorite and goethite inclusions, weighing 19.5 grams.
Key Characteristics:
Fluorite Inclusions: Fluorite is a generally common mineral, but having well-formed crystals of it included within quartz is less frequent.
Goethite Inclusions: Goethite, an iron-bearing hydroxide mineral, is often found as an inclusion in quartz, sometimes appearing as fanned dendritic forms or golden "organ-pipes". It can create visible banding within the quartz, showcasing various colors like golden yellow, reddish-brown, and orange, depending on the concentration and oxidation state of the fluids present during crystal formation.
Quartz Cluster: The specimen is a cluster of quartz crystals, which often form in various shapes and sizes.
Weight: The specimen weighs 19.5 grams.
Value Considerations:
Rarity: Quartz with inclusions of both fluorite and goethite can be quite rare and highly desirable for collectors.
Aesthetics: The visual appeal of the specimen, including the clarity, color, and formation of the inclusions within the quartz, plays a significant role in its value.
Size: While 19.5 grams is a specific weight, the overall size of the cluster and the prominence of the inclusions are also important factors.
Provenance: The origin of the specimen (e.g., from a renowned locality like Madagascar for quartz with fluorite inclusions) can increase its value.
Examples from Search Results:
Fluorite included quartz is mentioned as a fascinating example of syngenetic inclusions, where fluorite crystals grew on the quartz face and were later enclosed within the growing quartz crystal.
Specimens with distinct colloidal goethite banding, like those found in Nigeria, are considered particularly rare and offer a visual record of changing hydrothermal environments.
Fluorite-included quartz can have metaphysical properties associated with both fluorite and clear quartz, with the combination amplifying the energy of the crystal.