Fujian Calcite w Pyrite and Quartz

Fujian Calcite w Pyrite and Quartz Fujian calcite, specifically, is characterized by its visual appearance, spectral properties, and chemical composition. It often appears as colorless or yellow-brown, rhombic cleavage blocks with a transparent and glassy luster. Spectrally, it exhibits characteristic absorption peaks and Raman spectra. Chemically, it is primarily composed of Calcium Oxide (CaO) and may also contain traces of Manganese Oxide (MnO), Iron Oxide (FeO), and Silica (SiO). Elaboration: Visual Appearance: Calcite from Fujian is known for its clear, glassy appearance. It may be colorless, but often has a yellow or brown hue. The crystals exhibit a perfect rhombohedral cleavage, meaning they break along three specific planes to form rhombohedral shapes. Spectral Characteristics: FT-IR (Fourier Transform Infrared) Spectroscopy: Fujian calcite shows distinct absorption peaks in the fingerprint region of the FT-IR spectrum at specific wavenumbers (e.g., 709 cm⁻¹, 887 cm⁻¹, 1480 cm⁻¹). Raman Spectroscopy: Raman spectra reveal absorption peaks at different wavenumbers, such as 713 cm⁻¹, 1087 cm⁻¹, 155 cm⁻¹, and 282 cm⁻¹. Chemical Composition: Fujian calcite is primarily composed of Calcium Carbonate (CaCO₃), which is also known as Calcium Oxide (CaO). In addition to CaO, it may also contain minor amounts of Manganese Oxide (MnO), Iron Oxide (FeO), and Silicon Oxide (SiO). Other Notable Features: Fujian calcite can also be described as having a vitreous (glass-like) luster in its crystalline form, while massive forms might be dull. It is known for its ability to effervesce (bubble) when reacted with dilute acid at room temperature. In addition to these specific properties, Fujian calcite is also known for its unique crystal formations, including: Clear, clear columnar calcite . UV-reactive pink dogtooth calcite . Devil’s eye calcite . Golden honey calcite .