Choosing the right tumbled stones is not only about the material or color. Size, shape, and quantity can make a significant difference depending on how you plan to use them.
For wholesale buyers, one of the most common questions is: Which size should I choose, and how many pieces can I expect?
At RockZ, tumbled stones are sold by weight rather than by piece. This means the number of stones in a 100 g order can vary depending on the material, density, size, and shape.
This guide will help you understand the differences and choose the right tumbled stones for your application.
1. Choosing the Right Tumbled Stone Size
Tumbled stones are available in several different size ranges. The right size depends largely on how you plan to use the stones.
2. How Many Tumbled Stones Are in 100 g?
At RockZ, tumbled stones are sold by weight, so the exact number of pieces in a 100 g order will vary.
As a general reference, most crystal materials fall within the ranges shown below.
The approximate quantities are:
| Size | Approx. Pieces per 100 g |
|---|---|
| 1.2–1.5 cm | 24–28 pcs |
| 1.5–2 cm | 14–17 pcs |
| 2–3 cm | 4–7 pcs |
| 3–4 cm | 3–4 pcs |
| 4–5 cm | 2–3 pcs |
These numbers are approximate rather than guaranteed piece counts.
3. Why Does the Number of Pieces Vary by Material?
The number of stones in 100 g depends not only on their size, but also on their density.
Most crystal materials generally fall within or around the ranges shown in our buying guide.
However, denser materials may contain fewer pieces within the same weight.
For example, Jasper and materials with higher metal content, such as Hematite and Chalcopyrite, may contain a number of pieces equal to or slightly below the lower end of the ranges shown above.
This is why piece counts should always be considered a general reference when purchasing tumbled stones by weight.
4. Understanding Tumbled Stone Shapes
Size and shape are two different characteristics.
Two stones can have a similar size but look quite different depending on their shape.
For example, some tumbled stones are:
- A Common Shape — an uneven outline with smooth, raised corners
- A Rounded / Oval — nearly round to oval, thick or flatter
- An Irregular / Blocky — flat or thick, clearly irregular
When choosing tumbled stones for wholesale products, consider whether your application suits a smoother Rounded / Oval look, or a more natural Common Shape or Irregular / Blocky look.
Want to know where these shapes come from? Read our full guide: Why Crystal Tumbles and Chips Have Different Shapes — how raw stones and offcuts become rounded, oval, or irregular after tumbling.
The photos on each product page provide the best reference for understanding the actual shape and appearance of the stones.
