| Specimen Details | |
|---|---|
| Weight | 4.3 lb’s – 1.95 kg’s |
| Dimensions | 7.05″ x 6.5″ across/tall (17.9 x 16.5 cm’s) |
| Country of Origin | Rio Grande Sol, Brazil |
Ultra Grade Large Brazilian Amethyst Cluster
NZD $391.00
SKU: A1119
This Amethyst Cluster has great shiny luster, incredible deep purple color and fantastic form! To get the best look at this wonderful specimen, check out the video just below! This cluster is in excellent condition.
In stock
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Amethyst Clusters Origins & Background
Amethyst Clusters are among the most recognized and widely collected forms of Amethyst. Rather than growing as single points, clusters consist of multiple crystal points sharing a common base, creating a radiating crystalline surface.
The appearance of Amethyst clusters varies significantly depending on geological conditions, growth environment, and locality. Factors such as available space, mineral concentration, temperature stability, and fluid movement all influence point size, density, color zoning, and overall structure.
Some clusters form as dense carpets of small points, while others develop fewer but larger, well-terminated crystals. Color can range from pale lavender to deep violet, sometimes with zoning, phantoms, or smoky undertones.
Major sources of Amethyst clusters include Brazil, Uruguay, Zambia, Madagascar, and Russia. Each region is known for distinct characteristics — for example, Uruguay is often associated with deeper color saturation, while Brazil commonly produces larger clusters with lighter hues.
Because clusters form in open cavities, their growth is influenced by the shape and size of the host rock, resulting in highly individual specimens with natural variation and character.
Amethyst Clusters Geological Information
Amethyst clusters form when silica-rich fluids enter open cavities within volcanic or metamorphic rock and crystallize over long periods. Multiple crystal points nucleate simultaneously on the cavity walls, growing inward toward the center.
The trigonal crystal structure of Quartz causes crystals to grow as six-sided prisms with pointed terminations. When conditions allow many growth sites to remain active at once, clusters develop rather than isolated points.
Variations in fluid chemistry, temperature, and mineral availability can cause differences in point size, clarity, and coloration within a single cluster. Growth interruptions may result in features such as phantoms, growth lines, or uneven point heights.
The characteristic purple color of Amethyst results from trace iron within the Quartz lattice combined with natural irradiation and subsequent geological heating.
Common Geological Occurrences
- Volcanic basalt cavities and geodes
- Hydrothermal Quartz veins
- Metamorphic rock environments
Physical Properties
| Property | Value |
|---|---|
| Mineral Species | Quartz (Amethyst variety) |
| Chemical Formula | SiO₂ |
| Crystal System | Trigonal |
| Hardness (Mohs Scale) | 7 |
| Luster | Vitreous |
| Transparency | Transparent to translucent |
| Fracture | Conchoidal |
Amethyst Clusters Crystal Care & Ownership Advice
⚠️ Sunlight & Heat:
Prolonged exposure to strong sunlight or heat may cause some Amethyst clusters to fade over time. Indirect or filtered light is recommended for display.
✋ Handling:
While Quartz is relatively hard, cluster points can chip if struck. Lift clusters from the base rather than by individual points.
🧼 Cleaning:
Clean using lukewarm water and a soft brush to remove dust between points. Avoid harsh chemicals or ultrasonic cleaners.
📦 Storage & Display:
Place clusters on stable surfaces where they are unlikely to be bumped. Padding beneath the base can help prevent accidental movement.
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Amethyst Origins & Background
Amethyst has been valued across cultures for thousands of years for its rich violet coloration and its association with clarity, balance, and composure. The name Amethyst originates from the Greek word amethystos, meaning “not intoxicated,” reflecting an ancient belief that the stone helped maintain clear thinking and moderation.
Historically, Amethyst was considered a stone of royalty and spiritual authority. It adorned crowns, rings, and ceremonial objects in Ancient Greece and Rome and later throughout medieval Europe. Its purple color was rare and strongly associated with wisdom, restraint, and elevated status.
Significant Amethyst deposits are found in Brazil, Uruguay, Zambia, Madagascar, and Russia. Each locality produces crystals with distinctive growth habits, color zoning, and internal features, making provenance an important consideration for collectors and natural crystal enthusiasts.
Amethyst’s coloration develops through trace amounts of iron within the Quartz lattice combined with natural irradiation and geological heating over extended time periods. This process often creates layered growth zones that contribute to the depth and visual complexity seen in higher-quality specimens.
Some Amethyst crystals display structural growth features such as internal windows, phantoms, record keepers, and time-link faces. These are physical indicators of crystal formation traits and are valued for both the insight they provide into natural growth processes and to possible Metaphysical propoties.
Amethyst Geological Information
Amethyst is a violet variety of Quartz (Silicon Dioxide – SiO₂) that typically forms within cavities, veins, and geodes in igneous and metamorphic rock environments. Crystals usually grow as hexagonal prisms with pointed terminations.
The purple coloration results from trace iron incorporated into the Quartz structure combined with natural irradiation from surrounding rock. Subsequent geological heating stabilizes these color centers, producing hues that range from pale lavender to deep royal purple.
Amethyst commonly forms in volcanic environments, particularly within gas cavities of cooling basalt flows. Over millions of years, silica-rich fluids crystallize slowly, allowing layered growth and the development of internal zoning and structural features.
Common Geological Occurrences
- Volcanic basalt cavities and geodes
- Hydrothermal Quartz veins
- Metamorphic rock environments
Physical Properties
| Property | Value |
|---|---|
| Mineral Species | Quartz (Amethyst variety) |
| Chemical Formula | SiO₂ |
| Crystal System | Trigonal |
| Hardness (Mohs Scale) | 7 |
| Luster | Vitreous |
| Transparency | Transparent to translucent |
| Fracture | Conchoidal |
Amethyst Crystal Care & Ownership Advice
⚠️ Sunlight & Heat:
Prolonged exposure to intense sunlight or heat may cause some Amethyst specimens to fade over time. For long-term preservation, extended placement in direct sunlight is best avoided.
✋ Handling:
Amethyst is relatively durable, but sharp impacts can chip crystal points or edges. Handle specimens gently, especially clusters and terminated points.
🧼 Cleaning:
Clean Amethyst using lukewarm water and a soft brush. Avoid harsh chemicals, ultrasonic cleaners, or abrasive tools, which may damage crystal surfaces.
📦 Storage & Display:
Prolonged exposure to intense sunlight or high heat may cause some Amethyst specimens to fade over time.
For long-term preservation, extended placement in direct sunlight is best avoided. Indirect light or filtered natural light is ideal for display. This preserves color while still allowing the crystal’s natural beauty to be appreciated.
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