When shopping for a diamond, you’ll likely come across a term that sounds a bit mysterious: fluorescence. It’s one of those lesser-known factors that can influence how your diamond looks, performs, and is priced. But is it a dealbreaker—or a hidden gem? Let’s break it down so you can shop with clarity (pun intended).
What Is Diamond Fluorescence?
Fluorescence refers to how a diamond reacts to ultraviolet (UV) light. Around 25–35% of diamonds naturally emit a soft glow—usually blue—when exposed to UV rays (like sunlight or black light). This glow is invisible under most lighting, but in some cases, it can impact how your diamond appears.
Fluorescence Grading Levels
- None
- Faint
- Medium
- Strong
- Very Strong
Most fluorescence in diamonds is blue, but rare cases can glow yellow, white, or even orange.
Does Fluorescence Affect a Diamond’s Appearance?
It depends on the strength and the diamond’s color grade:
- ✅ For Near-Colorless Diamonds (G–J): Medium to strong blue fluorescence can actually make the diamond appear whiter—an unexpected bonus!
- ⚠️ For Colorless Diamonds (D–F): Strong fluorescence may give the diamond a hazy or oily look in certain lighting conditions. That’s why high-grade diamonds with strong fluorescence tend to sell for less.
Does Fluorescence Affect Price?
Yes—but often in your favor. Diamonds with strong or very strong fluorescence are usually priced lower, even if the difference in appearance is minimal or nonexistent. That means savvy shoppers can score a deal.
Should You Avoid Fluorescence?
Not necessarily. Fluorescence isn’t inherently good or bad—it’s just another characteristic to consider. Here’s how to decide:
- If you’re buying a G–J color diamond, a bit of fluorescence may enhance its appearance.
- Always see the diamond in person or request high-res videos to check for haziness.
- Use fluorescence to your advantage when shopping on a budget.
Final Thought
Diamond fluorescence isn’t something to fear—it’s something to understand. In the right context, it can be a helpful tool for finding a beautiful diamond at a better value.
💎 Curious about how fluorescence impacts your diamond? Explore our curated collection or talk to our gem specialists for clarity on your perfect match.
