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General Overview
Hyalite opal is a fascinating gemstone that glows with a beautiful green color when exposed to ultraviolet light. However, there is some debate about whether hyalite opal requires shortwave ultraviolet light to glow.
Longwave UV vs. Shortwave UV
- Longwave UV radiation has a wavelength between 315 and 400 nanometers.
- Shortwave UV radiation has a wavelength between 200 and 280 nanometers.
Hyalite Opal and UV Light
Hyalite opal does not require shortwave UV light to glow. It will glow under both shortwave and longwave ultraviolet light. However, the glow will be more intense under shortwave ultraviolet light.
2025 Outlook
The demand for hyalite opal is expected to increase in the coming years. This is due to its unique color and its use in jewelry and other decorative items.
Comparison of Hyalite Opal and Other Opals
| Feature | Hyalite Opal | Fire Opal | Boulder Opal |
|---|---|---|---|
| Color | Green | Orange, red, yellow | Brown, yellow, red |
| Transparency | Transparent to translucent | Transparent to opaque | Opaque |
| Hardness | 5.5-6.5 | 5.5-6.5 | 5-6.5 |
| Value | Relatively low | Moderate | High |
Tips for Identifying Hyalite Opal
- Look for a green glow. Hyalite opal will glow green under ultraviolet light.
- Check the transparency. Hyalite opal is transparent to translucent.
- Examine the hardness. Hyalite opal has a hardness of 5.5-6.5.
Common Mistakes to Avoid When Identifying Hyalite Opal
- Confusing hyalite opal with other types of opal. Hyalite opal is often confused with fire opal and boulder opal. However, these opals have different colors and transparencies.
- Assuming that all hyalite opal glows under ultraviolet light. Not all hyalite opal glows under ultraviolet light. Some specimens may only glow faintly.
Step-by-Step Approach to Identifying Hyalite Opal
- Examine the opal under ultraviolet light. Look for a green glow.
- Check the transparency of the opal. Hyalite opal is transparent to translucent.
- Test the hardness of the opal. Hyalite opal has a hardness of 5.5-6.5.
Pros and Cons of Hyalite Opal
Pros:
- Unique green color
- Glows under ultraviolet light
- Relatively inexpensive
Cons:
- Not as hard as other opals
- May not glow as brightly under ultraviolet light as other opals
Frequently Asked Questions
- What is the difference between hyalite opal and fire opal? Hyalite opal is green and transparent to translucent, while fire opal is orange, red, or yellow and opaque.
- Can hyalite opal be used in jewelry? Yes, hyalite opal can be used in jewelry. However, it is not as hard as other types of opal, so it should be protected from scratches and other damage.
- How much is hyalite opal worth? The value of hyalite opal varies depending on its size, quality, and color. However, it is generally less expensive than other types of opal.
Conclusion
Hyalite opal is a beautiful gemstone that glows with a green color under ultraviolet light. It is not difficult to identify, and it can be used in a variety of jewelry and other decorative items.
