Volcano Agate 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 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.
