A calcium carbonate mineral, known for its wide range of colors and diverse crystal forms.
Calcite can appear clear, white, yellow, pink, green, or orange, with variations shaped by trace elements and the conditions under which it forms.
Its crystal structure allows for a wide range of growth patterns.
Some develop into rhombohedral forms, with clean, geometric faces.
Others grow into elongated, pointed crystals, often referred to as dogtooth calcite, with sharp, tooth-like shapes.
In certain conditions, calcite forms rounded, clustered surfaces —
known as botryoidal formations, resembling small grape-like spheres.
It can also grow in layered, downward formations such as stalactitic calcite,
commonly seen in cave environments.
In other cases, mineral-rich fluids deposit in stages,
creating layered or banded structures that record shifts in growth over time.
Calcite is also known for its optical properties, including strong interaction with light, and in some cases, double refraction.
Rather than a single appearance, it is defined by variation — each form shaped by how it grows.
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