Amethyst and agate tower

Amethyst with Agate Inclusion Tower

This striking amethyst tower features soft lavender tones blended with milky quartz and a captivating central inclusion of natural agate. The polished point shape contrasts beautifully with the raw internal textures, creating a unique display piece full of depth and organic character. The internal formation reveals layered, semi-translucent structures typical of agate, forming a natural focal point within the crystal.

Key Features
Material: Natural amethyst (quartz variety) with agate inclusion
Formation: Polished tower with natural internal cavity and banded mineral growth
Color: Pale lavender, clear to milky quartz, with soft cream to grey agate tones
Crystal Habit: Mixed crystalline quartz with internal microcrystalline (chalcedony/agate) structures
Finish: Polished exterior with raw internal formations
Shape: Six-sided tower with pointed termination

Dimensions
Approx. Size: 9.7cm x 3.9cm
Weight: 228 grams

Geological & Scientific Notes
Amethyst is a variety of quartz that forms in cavities within volcanic rock, where silica-rich fluids slowly crystallise over time. The lighter purple tones seen in this piece suggest lower iron content and more subtle natural irradiation during formation.

This piece also contains agate, a banded form of chalcedony (microcrystalline quartz), which formed in stages as layers of silica were deposited within the cavity. Unlike the larger crystal structure of amethyst, agate develops in fine, compact layers, often creating soft banding or cloudy, flowing patterns as seen in the central inclusion.

The presence of both amethyst and agate indicates multiple phases of mineral formation. The cavity likely began forming with chalcedony deposits before later quartz crystallisation created the amethyst structure around and within it. This combination results in a visually dynamic piece that showcases both crystalline and microcrystalline quartz in one specimen.

Mineral: Quartz
Formula: SiO₂
Colour: Pale lilac → deep purple
Cause of Colour: Iron + natural irradiation
Lustre: Vitreous (glassy)
Transparency: Transparent → translucent
Streak: White
Hardness: 7 (Mohs)
Fracture: Conchoidal
Cleavage: None
Density: ~2.65
Crystal System: Trigonal
Habit: Hexagonal prisms
Formation: Volcanic cavities (geodes)
Common Locations: Brazil, Uruguay, Zambia
Optical:
Refractive Index: ~1.54–1.55
Weak pleochroism
Extras:
May fade or turn yellow when heated
Often shows colour zoning or banding

Condition
Natural crystal with polished exterior
Internal inclusions and fractures typical of quartz
Visible agate inclusion and internal cavity features
Variation in colour, clarity, and internal structure
No visible dyeing or artificial enhancement

Care Instructions
Handle with care to avoid chips, especially around the point
Clean gently with a soft cloth or soft brush
Avoid prolonged exposure to water
Keep out of direct sunlight to preserve colour
Store safely to prevent scratches or damage