Volcanic Agate Sphere, a UV reactive crystal ball, glowing vibrant green with dark blue swirls, on a wooden base.
Three polished Volcanic Agate Spheres, UV reactive, showcasing vibrant green, blue, and earthy bands, grounding and transformative.
Volcanic Agate Sphere, a UV reactive crystal ball with vibrant green fluorescence and earthy banding, on a wooden stand.
Three Volcanic Agate Spheres, one deep blue and two with striking blue, white, and brown banding, on a wooden stand.
Volcanic Agate Spheres: UV Reactive Crystal Balls with rich blue, brown, and white banding, showcasing unique geological fingerprints.
Volcanic Agate Sphere, a UV reactive crystal ball with concentric blue, white, and brown bands, held in a hand.
Volcanic Agate Sphere, 59mm, 274g. Earthy brown, white, and deep blue bands with a raw geode cavity. Grounding and transformative.
Volcanic Agate Sphere, a 244g, 57mm hand-polished, dark, UV reactive crystal ball for grounding and transformation.
Volcanic Agate Sphere, a 60mm, 310g UV reactive crystal ball with white, blue, and earthy bands.
Volcanic Agate Sphere, a 232g, 56mm dark, polished crystal ball with a geode opening, grounding and transformative.
Volcanic Agate Sphere, a 56mm, 238g grounding and transformative crystal ball with earthy bands and UV reactive properties.
Volcanic Agate Sphere, a 61mm, 316g UV reactive crystal ball with rich banding and hidden fluorescent colors.
Volcanic Agate Sphere, a 55mm, 228g UV reactive crystal ball with deep blue and white banding, on a wooden stand.
Volcanic Agate Sphere, a 62mm, 313g UV reactive crystal ball with rich dark bands and earthy tones.
Volcanic Agate Sphere, 62mm, 317g, with earthy bands and a glowing, silica-rich core, grounding and transformative.
Volcanic Agate Sphere, a 61mm, 298g UV reactive crystal ball with deep blue and earthy bands, on a wooden stand.
Volcanic Agate Sphere, 63mm, 318g. A hand-polished, earthy sphere with a deep blue geode cavity, grounding and transformative.
Volcanic Agate Sphere, 56mm, 225g. Earthy, banded crystal ball with dark blue and white patterns, UV reactive.
Volcanic Agate Sphere, a 60mm, 281g UV reactive crystal ball with rich banding, grounding and transformative.
Volcanic Agate Sphere, a 346g, 64mm polished crystal ball with deep blue and white banding, UV reactive.
Volcanic Agate Sphere, a 60mm, 281g UV reactive crystal ball with rich, earthy bands and hidden fluorescent colors.
Volcanic Agate Sphere, a 63mm, 347g hand-polished, dark blue UV reactive crystal ball with earthy bands.
Volcanic Agate Sphere, a 60mm UV reactive crystal ball with earthy bands and hidden fluorescent colors.
Volcanic Agate Sphere, a 219g, 55mm UV reactive crystal ball with earthy bands and hidden fluorescent colors.
Volcanic Agate Sphere, 63mm, 330g. Earthy sphere with hidden fluorescent colors, grounding and transformative.
Volcanic Agate Sphere, 60mm, 288g. Hand-polished, UV reactive crystal ball with earthy and dark blue banding.
Volcanic Agate Sphere, a 58mm, 249g polished crystal ball with deep blue-grey bands and sparkling white druzy geodes.
Volcanic Agate Sphere, a 60mm UV reactive crystal ball with earthy bands and a deep blue geode center.
Volcanic Agate Sphere, a 61mm, 291g UV reactive crystal ball with rich banding and hidden fluorescent colors.
Volcanic Agate Sphere, a 55mm, 224g UV reactive crystal ball, showcasing its dark, earthy tones and unique geological fingerprint.
Volcanic Agate Sphere, 59mm, 285g. Earthy, banded, UV reactive crystal ball with grounding and transformative power.
Volcanic Agate Sphere, 54mm, 210g. Deep blue-black with a sparkling druzy cavity, grounding and transformative.
Volcanic Agate Sphere, a 54mm, 211g UV reactive crystal ball with unique earthy banding, grounding and transformative.
Volcanic Agate Sphere, 61mm, 293g. Deep blue and white banded crystal ball, grounding and transformative.
Volcanic Agate Sphere, a 61mm, 296g UV reactive crystal ball with rich banding and earthy tones.
Volcanic Agate Sphere, a 59mm, 268g UV reactive crystal ball with rich, dark banding and a unique geological fingerprint.
Volcanic Agate Sphere, a 53mm, 199g UV reactive crystal ball with earthy bands and a unique geode center.
Volcanic Agate Sphere, a 64mm, 345g hand-polished crystal ball with deep blue, white, and earthy bands.
Volcanic Agate Sphere, a UV reactive crystal ball, 57mm, 248g. Richly banded, earthy sphere, grounding and transformative.

Volcanic Agate UV Reactive Crystal Sphere

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Size chart

Not sure which crystal sphere size is right for you? Use this guide to find your perfect fit. Weight estimates are approximate and vary based on the density of each crystal type. This guide covers sizes up to our largest available sphere at ~10 kg.

Crystal sphere size comparison chart showing sizes from 50mm to 200mm with sports ball references

Crystal Sphere Size Chart

All weights are estimates based on average crystal density. Actual weight may vary by stone type.

Diameter (inches) Diameter (mm) Approx. Weight
1 in. 25.4 mm ~100–150 g
2 in. 50.8 mm ~300–400 g
3 in. 76.2 mm ~600–800 g
4 in. 101.6 mm ~1,000–1,200 g
5 in. 127 mm ~1,500–1,800 g
6 in. 152.4 mm ~2,200–2,500 g
7 in. 177.8 mm ~3,000–3,500 g
8 in. 203.2 mm ~4,000–4,500 g
9 in. 228.6 mm ~5,000–5,500 g
10 in. 254 mm ~6,000–6,500 g
11 in. 279.4 mm ~7,000–7,500 g
12 in. 304.8 mm ~8,000–8,500 g
13 in. 330.2 mm ~9,000–9,500 g
14 in. 355.6 mm ~10,000–10,500 g

Real-World Size Reference

  • 40 mm — About the size of a ping pong ball
  • 60 mm — About the size of a billiard ball
  • 95 mm — About the size of a baseball
  • 200 mm — About the size of a bowling ball
  • 240 mm — About the size of a basketball

Choosing the Right Size

  • 50–80 mm: Ideal for holding during meditation, carrying in a bag, or placing on a small altar.
  • 100–120 mm: The most popular display size. Great for desks, shelves, and nightstands.
  • 150–200 mm: A striking centerpiece for living rooms, healing spaces, or crystal grids.
  • 200 mm+: Collector and statement pieces. Significant weight — plan your display accordingly.

All measurements are approximate. Natural crystals vary in weight based on stone density and formation. Each sphere is unique.

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Pick up a Volcanic Agate sphere and you're holding something that took millions of years to form. In natural light, the banding is already striking: concentric rings of deep blue-grey, earthy brown, and white silica layered with the kind of precision that only geological time can produce. Some spheres have raw geode cavities where the center never fully filled in, leaving a sparkling druzy pocket that catches the light. Flip on a UV blacklight and the whole thing shifts, hidden fluorescent colors emerging from within the stone in a display that genuinely surprises people every time. No two are alike. Each one is its own geological event.

Product Highlights

  • Natural Volcanic Agate sphere with dramatic concentric banding from ancient volcanic activity
  • UV reactive: hidden fluorescent colors emerge under ultraviolet blacklight
  • Some specimens feature raw druzy geode cavities for added character
  • Sizes range approximately 53mm to 64mm across the collection
  • Part of the Agate family, formed from silica-rich volcanic fluids
  • Available in the UV Reactive collection for fluorescent mineral enthusiasts
  • Linked to the Root Chakra for grounding and stability
  • Activates the Sacral Chakra for creativity and emotional flow
  • Resonates with the Solar Plexus Chakra for personal power and courage
  • This product is an exact pick as pictured, one of a kind.
  • Beautiful on a sphere stand, altar, or desk; keep a UV flashlight nearby for the full effect

Chakra Connection

Volcanic Agate's energy moves through three chakras in a way that feels both grounding and activating at the same time. Its primary resonance is with the Root Chakra, where it anchors scattered energy, builds a sense of physical safety, and helps you feel steady even when circumstances aren't. The Sacral Chakra connection brings in the stone's creative and transformative fire, supporting emotional fluidity and the courage to move through change. The Solar Plexus Chakra activation is where the volcanic energy really shows up, boosting personal power, decisiveness, and the willingness to take bold action. The sphere shape amplifies all of this, radiating energy outward in every direction rather than focusing it in a single point, which makes it particularly effective as a room anchor or meditation centerpiece.

How to Use

  • Hold it during grounding or transformation meditations. The weight and smooth surface make it ideal for tactile focus work, and the sphere shape fits naturally in both hands.
  • Place it at the center of a crystal grid for transformation or courage work, paired with Black Tourmaline for protection and Carnelian for motivated action.
  • Use it as a desk anchor during high-pressure projects or periods of significant change. Its grounding energy is subtle but consistent.
  • Display it under UV blacklight as a conversation piece. The fluorescent reveal genuinely surprises people who haven't seen UV reactive minerals before.
  • Incorporate it into fire element rituals, new moon intention setting, or transformation ceremonies as a focal point.
  • Pair it with Obsidian or Smoky Quartz for deep shadow work and energetic clearing.

Crystal Care

Volcanic Agate is a durable stone with a Mohs hardness of 6.5 to 7, making it easy to care for. Cleanse it with sound (a singing bowl works beautifully), sage or palo santo smoke, or by placing it on a Selenite charging plate overnight. It can handle brief rinsing with water, though prolonged soaking isn't recommended. Recharge it under the full moon, on the earth outdoors, or in indirect sunlight. Limit extended direct sun exposure to preserve the natural color and UV reactive properties. Store it on a sphere stand or soft cloth to prevent rolling and protect the polish. If your sphere has a raw geode cavity, take a little extra care to keep that area clean and dry.

FAQs

Q: Is this a natural stone?
A: Yes. Volcanic Agate is a naturally occurring chalcedony that formed in ancient volcanic environments. The UV reactive fluorescence is a natural property of the mineral composition, not a treatment or coating.

Q: Do I need special equipment to see it glow?
A: You'll need a UV blacklight (ultraviolet light source) to see the fluorescent effect. UV flashlights are widely available and inexpensive. The glow is genuinely impressive and worth having one on hand.

Q: What crystals pair well with Volcanic Agate?
A: For grounding and protection, it works well with Black Tourmaline and Obsidian. For courage and action, try Carnelian or Tiger Eye. For transformation and clarity, Smoky Quartz or Clear Quartz make excellent companions.

Q: What's the difference between Volcanic Agate and regular Agate?
A: Volcanic Agate formed specifically in volcanic environments where silica-rich fluids filled cavities in lava rock. This gives it a more dramatic banding pattern and often more intense color variation than sedimentary agates. The UV reactivity is also more common in volcanically-formed agates due to their unique mineral composition.

Q: How do I choose my sphere?
A: Each sphere is individually photographed and numbered. Select your preferred piece from the variant selector. The photos show the exact sphere you will receive, including its unique banding, color, and character.

What Is Volcanic Agate?

Volcanic Agate is a variety of chalcedony that formed millions of years ago when silica-rich hydrothermal fluids slowly filled cavities in volcanic rock. As the fluids cooled and crystallized in repeated cycles, they deposited layer after layer of mineral-rich silica, creating the concentric banding that makes each sphere so visually distinctive. The UV reactive properties come from trace minerals within the stone that absorb ultraviolet light and re-emit it as visible fluorescence, a phenomenon that varies in color and intensity from specimen to specimen. Historically, agate has been prized across cultures for its grounding and protective qualities, and the volcanic variety carries an added dimension of transformative fire energy that practitioners find particularly potent for work involving change, courage, and personal power. For a deeper look at the science behind UV reactive minerals, the UV Reactive Crystals Guide is a great starting point. To understand how these spheres are formed and shaped, How Agate Spheres Are Sourced and Made walks through the full process.

Further Reading

If one of these spheres caught your eye, trust that. Volcanic Agate has a way of drawing in the people who need its particular combination of grounding stability and transformative fire. Browse the full UV Reactive collection if you're drawn to fluorescent minerals, or explore the Agate and Grounding and Stability collections for stones that complement this one. The Crystal Spheres collection has more hand-selected options if the sphere shape resonates with you.

  • Free shipping on orders over $100.00 within the contiguous United States.
  • Shipping times may vary depending on the product
  • We strive to process and ship orders within 2-3 business days
  • Estimated delivery time is typically 12-16 days, though it may vary based on the destination
  • We appreciate your patience and understanding as we work diligently to deliver your order promptly and securely.
  • For any further assistance or inquiries regarding shipping, please feel free to reach out our customer support team.

Each crystal is natural and unique, with no two crystals being identical. Some crystal may contain naturally formed cracks within itself, not caused by other objects.

Please note that size, color, and patterns may vary due to the different batches of crystals and its natural inclusions, or hand measurements.

You can always reference the Size Chart on every product page to translate grams to pounds and ounces, and, millimeters and centimeters to inches.

Thank you for understanding and enjoying all the wonders of crystals.

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