| Specimen Details | |
|---|---|
| Weight | 2.0 lb’s – 897.2 g |
| Dimensions | 3.402″ Diameter (8.641 cm’s) |
| Country of Origin | China |
Polished Fluorescent Volcanic Agate Sphere
USD $97.00
SKU: P5662
With a hardness of 6–7 on the Mohs scale, Volcanic Agate is as durable as it is stunning. Formed when water seeped into air pockets in cooling lava, this natural process left behind mesmerizing deposits of iron, quartz, and other minerals. What truly sets agate apart is its unique banded pattern—a captivating blend of translucent chalcedony and crystalline quartz. Under UV light (365nm), this gem reveals a magical greenish glow thanks to the presence of uranyl ions, adding an extra touch of natural wonder to its already enchanting look.
In stock
Use the tabs below to explore crystal origins, geological details, crystal care guidance, and metaphysical insights.
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Agate Origins & Background
Agate is a banded variety of Chalcedony Quartz, valued for its wide range of colors, intricate patterns, and grounding visual presence. Unlike single-crystal Quartz, Agate forms in layered microcrystalline structures, giving rise to its distinctive banding and scenic patterns.
The name Agate is believed to originate from the Achates River (modern-day Dirillo River) in Sicily, where agates were collected in ancient times. Agate has been used for tools, seals, jewelry, and ornamental objects for thousands of years across many cultures.
Major Agate-producing regions include Brazil, Uruguay, India, Madagascar, Mexico, and the United States. Different localities produce distinct color palettes and banding styles, making provenance especially interesting for collectors.
Agates often display concentric banding, fortification patterns, or plume-like inclusions. These features are natural records of mineral-rich fluid deposition over long geological periods.
Historically, Agate has been associated with protection, balance, and stability. Many ancient cultures believed Agate offered grounding energy and physical protection during travel or battle.
Agate Geological Information
Agate is a microcrystalline variety of Quartz (Silicon Dioxide – SiO₂), belonging to the Chalcedony group. It forms when silica-rich fluids fill cavities in volcanic or sedimentary rock and slowly crystallize in layers.
Over time, successive deposits of silica create Agate’s characteristic banding. Variations in trace minerals, temperature, and fluid chemistry influence color and pattern formation.
Agate commonly forms in volcanic environments, particularly within gas bubbles in basalt. As these cavities are gradually filled, layered growth develops from the outer edges inward.
Common Geological Occurrences
- Volcanic basalt cavities
- Silica-rich sedimentary environments
- Hydrothermal Quartz deposits
Physical Properties
| Property | Value |
|---|---|
| Mineral Species | Chalcedony (Agate variety) |
| Chemical Formula | SiO₂ |
| Crystal System | Trigonal (microcrystalline) |
| Hardness (Mohs Scale) | 6.5 – 7 |
| Luster | Waxy to vitreous |
| Transparency | Translucent to opaque |
| Fracture | Conchoidal |
Agate Crystal Care & Ownership Advice
⚠️ Sunlight & Heat:
Agate is generally stable in sunlight, but dyed Agates may fade with prolonged exposure. Natural Agate is best displayed in indirect or ambient light for long-term preservation.
✋ Handling:
Agate is durable, but sharp impacts can chip edges, especially on polished pieces. Handle with reasonable care.
🧼 Cleaning:
Agate is water-safe. Clean using lukewarm water and a soft brush or cloth. Avoid harsh chemicals that could affect surface polish or dye (if present).
📦 Storage & Display:
Store Agate away from harder or sharper stones that may scratch its surface. Polished Agates display well on padded stands or natural wood surfaces.
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Banded Agate Origins & Background
Banded Agate is a classic and widely recognized variety of Chalcedony Quartz, defined by its rhythmic, layered banding patterns. These bands may appear as concentric rings, fortification-style lines, or flowing layers that reflect the stone’s gradual formation process.
Banded Agate has been used by human cultures for thousands of years for tools, seals, amulets, and ornamental objects. Its durability and striking patterns made it especially valued in ancient civilizations across the Mediterranean, Middle East, and Asia.
Significant sources of Banded Agate include Brazil, Uruguay, India, Madagascar, Mexico, and the United States. Different regions produce distinctive banding styles and color combinations.
The layered appearance of Banded Agate has long been associated symbolically with protection, stability, and continuity, reflecting the stone’s slow, methodical growth over geological time.
Naturally occurring Banded Agate can appear in a wide range of color combinations. Some specimens on the market are dyed to enhance contrast or vibrancy, which is common within the Agate family.
Banded Agate Geological Information
Banded Agate is a microcrystalline variety of Quartz (Silicon Dioxide – SiO₂) belonging to the Chalcedony group. It forms when silica-rich fluids fill cavities in volcanic or sedimentary rock and crystallize in successive layers.
Each band represents a distinct phase of mineral deposition. Variations in trace elements, temperature, and fluid chemistry result in changes in color, translucency, and texture between layers.
Banded Agate commonly forms within gas cavities in basaltic lava flows. Over long periods, silica is deposited from the outer walls inward, creating the characteristic concentric or fortification banding.
Common Geological Occurrences
- Volcanic basalt cavities
- Silica-rich sedimentary environments
- Associated with Quartz, Jasper, and other Chalcedony varieties
Physical Properties
| Property | Value |
|---|---|
| Mineral Species | Chalcedony (Banded Agate variety) |
| Chemical Formula | SiO₂ |
| Crystal System | Trigonal (microcrystalline) |
| Hardness (Mohs Scale) | 6.5 – 7 |
| Luster | Waxy to vitreous |
| Transparency | Translucent to opaque |
| Fracture | Conchoidal |
Banded Agate Crystal Care & Ownership Advice
⚠️ Sunlight & Heat:
Natural Banded Agate is generally stable, but dyed specimens may fade with prolonged exposure to intense sunlight. Display in indirect or ambient light when possible.
✋ Handling:
Banded Agate is durable, but sharp impacts can chip polished edges. Handle with care, especially slabs and freeforms.
🧼 Cleaning:
Banded Agate is water-safe. Clean using lukewarm water and a soft cloth or brush. Avoid harsh chemicals and ultrasonic cleaners if dye treatment is suspected.
📦 Storage & Display:
Store away from harder stones that may scratch its surface. Padded stands or cloth separation are recommended for polished pieces.
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Fluorescent Minerals Origins & Background
Fluorescent minerals are a fascinating class of minerals that emit visible light when exposed to ultraviolet (UV) radiation. This phenomenon has captivated scientists, collectors, and mineral enthusiasts for centuries and represents one of the most visually dramatic expressions of mineral behavior.
Fluorescence is found in minerals from many geological environments and localities worldwide. Some of the most famous fluorescent mineral localities include Franklin and Sterling Hill, New Jersey (USA), Mexico, China, Canada, Australia, and parts of Europe. Each locality produces distinctive fluorescent responses, colors, and intensities.
Unlike color or crystal shape, fluorescence is often invisible under normal lighting conditions and only reveals itself under UV light—making it a hidden property that exists regardless of whether it is being observed.
Fluorescent Minerals Geological Information
Fluorescence occurs when a mineral absorbs ultraviolet light and re-emits it as visible light. This happens because certain atoms or trace impurities within the mineral structure—known as activators—become temporarily excited by UV radiation. When these atoms return to their normal energy state, they release excess energy as visible light.
Common activator elements include:
- Manganese
- Lead
- Chromium
- Rare earth elements
Fluorescence is not limited to a specific mineral group. It can occur in a wide range of minerals, including:
- Calcite
- Fluorite
- Willemite
- Opal
- Quartz (rarely, but notably)
- Aragonite
Different wavelengths of UV light produce different responses:
- Long-wave UV (LW): most common for display and collecting
- Short-wave UV (SW): often produces stronger or different colors
- Mid-wave UV (MW): less commonly used, but scientifically important
Some minerals fluoresce brightly, others faintly, and some not at all—even within the same species. Fluorescence depends on precise chemical composition and crystal structure rather than outward appearance.
Physical Properties
| Property | Value |
|---|---|
| Material Type | Varies (fluorescence is a property, not a mineral) |
| Trigger | Ultraviolet radiation |
| Emission | Visible light (various colors) |
| Persistence | Instant or delayed (phosphorescence in some cases) |
| Occurrence | Specific impurities or defects in crystal lattice |
Fluorescence vs. Phosphorescence
Some minerals continue to glow briefly after the UV source is removed. This related phenomenon is called phosphorescence. While fluorescence stops almost immediately when UV light is turned off, phosphorescent minerals store energy for a short time and release it gradually.
Fluorescent Minerals Care & Ownership Advice
⚠️ UV Safety:
Always use proper eye and skin protection when working with ultraviolet light, especially short-wave UV. Never look directly into UV sources.
🧼 Cleaning:
Cleaning methods depend on the specific mineral species. Many fluorescent minerals are sensitive to acids, moisture, or abrasion. Clean gently and research individual specimens when unsure.
☀️ Light:
Normal visible light does not harm fluorescence. Prolonged or intense UV exposure is generally safe for minerals but unnecessary when not in use.
📦 Storage & Display:
Store specimens padded and separated. For display, ensure stable mounting and safe UV lighting setups.

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