UV Reactive Calcite with Fluorite | Phosphorescent Specimen | Hubei, China

Weight: 1.062 kg
Size: approx. 14 × 14 × 7 cm
Locality: Hubei Province, China
Stand included: Yes
UV response: Multi-colour fluorescence + phosphorescence

🌍 About this specimen

This is an exceptional, large UV-reactive calcite specimen with associated fluorite, displaying dramatic coral-like crystal growth and striking multi-colour fluorescence under ultraviolet light.

In daylight, the piece shows soft peach-pink and honeyed calcite formations with a naturally sculptural, reef-like structure. Under UV, it transforms completely — revealing icy blue, blue-white and electric violet fluorescence, with vivid green pinpoints and areas of noticeable phosphorescence that continue to glow briefly after the UV light is removed.

The reverse of the specimen features a particularly intense fluorite zone, producing a saturated violet-blue response that anchors the piece visually and makes it especially impressive on display.

 UV & phosphorescence details

• Calcite: strong blue to blue-white fluorescence

• Fluorite: vivid violet-blue fluorescence

• Secondary activators: green pinpoint fluorescence

• Phosphorescence: visible afterglow following UV exposure

This combination of colours, textures, and afterglow makes the specimen highly desirable to UV collectors and mineral enthusiasts alike.

Geological formation

Calcite and fluorite commonly form together in hydrothermal environments, where mineral-rich fluids move through fractures in the host rock over long geological timescales.

As conditions such as temperature, pressure, and chemistry shift, different minerals crystallise in stages — resulting here in layered growth, complex crystal habits, and the remarkable UV behaviour seen in this piece.

 Approximate geological age

The calcite and fluorite deposits from this region of China are generally associated with Mesozoic to early Cenozoic geological activity, placing the formation of this specimen at approximately:

100–250 million years old

A reminder that this piece represents processes far older than humanity itself.

⭐ Rarity & collectability

While calcite and fluorite are not rare minerals individually, specimens of this size with strong multi-colour UV fluorescence, phosphorescence, and aesthetic crystal growth are uncommon.

Large, well-balanced pieces with both visual beauty and dramatic UV performance — especially with confirmed Chinese localities such as Hubei — are increasingly sought after by collectors.

This is a statement specimen, suitable as:

• A centrepiece in a UV collection

• A display mineral for cabinets or shelves

• A high-quality example of fluorescent mineralogy

 Care & handling

• Handle gently — natural crystal edges and terminations are delicate

• Avoid prolonged exposure to moisture

• Store and display away from direct sunlight to preserve colour and surface integrity