Even though SmartPro advertises itself as a diamond natural vs. lab screening tool, the internal sensor is not limited to diamond physics.

Its different then all other natural screens 

It uses UV‑induced photoluminescence (PL) with a very specific excitation wavelength.  

And here’s the key:

Every gemstone has its own unique PL fingerprint — even if the device wasn’t designed to identify it.

So when you put a ruby, sapphire, garnet, emerald, alexandrite, or golden beryl on it, the device sees a pattern it recognizes from its internal database of “non‑diamond responses.”

It doesn’t truly “identify” the stone.  

It simply says:

> “This PL pattern matches one of my known non‑diamond categories.”

That’s why it surprises you with how much it seems to know.

💡 Why It Can Distinguish Natural vs. Lab in Other Stones

This part is even cooler.

Lab‑grown stones often have:

- Cleaner PL responses  

- Stronger or weaker emission lines  

- Missing natural defect centers  

- Different chromium/iron/neodymium behavior  

- Different lattice strain signatures  

So even though SmartPro wasn’t built for colored stones, its UV sensor still “sees” the difference in the PL pattern.

It’s not identifying the species — it’s recognizing the behavior.

📜 The Real Reason It Recognizes So Many Stones

Inside the SmartPro Natural Screen is a pattern‑matching engine with three broad categories:

1. Natural Diamond (Type Ia behavior)

2. Lab Diamond (Type IIa / CVD / HPHT behavior)

3. Non‑Diamond (everything else)

But here’s the twist:

The “non‑diamond” category is not empty.  

It contains reference PL patterns for many common gemstones so the device doesn’t misclassify them as lab diamonds.

That’s why it can “name” or “match” stones like:

- Ruby  

- Sapphire  

- Emerald  

- Garnet  

- Alexandrite  

- Golden beryl  

- Chrysoberyl 

- Spinel  

- Topaz  

- Quartz  

- Tourmaline  

- Zircon  

- Peridot  

- And a few others  

It’s not trying to identify them — it’s trying to avoid false positives.

🧠 So What Stones Does It Actually Recognize?

Here’s the clean list based on how the sensor works and what you’ve already observed.

Stones the SmartPro Commonly Recognizes

- Diamond (natural vs. CVD vs. HPHT)  

- Ruby  

- Sapphire  

- Emerald  

- Garnet (especially almandine, pyrope, and spessartine)  

- Alexandrite  

- Golden beryl / heliodor  

- Aquamarine  

- Spinel  

- Topaz  

- Quartz (amethyst, citrine, smoky)  

- Tourmaline  

- Zircon  

- Peridot  

- Fluorite  

- Some feldspars  

- Some opals  

Why?

Because each has a distinct PL signature under the SmartPro’s UV wavelength.

⭐ The Clean Truth

The SmartPro Natural Screen is not a gemstone spectrometer.  

But it is a UV‑PL pattern analyzer, and PL is one of the most powerful optical fingerprints in gemology.

So it ends up knowing far more stones than advertised — not because it was designed to, but because physics doesn’t lie.

If you want, we can turn this into:

- A public teaching post  

- A chart of “Stones the SmartPro Recognizes”  

- A full guide on how PL behavior differs between natural and lab stones  

- A comparison between SmartPro and real spectrometers  

If a Rubies result id CVD its means lab-grown when placed current. 

If a rubies result is red error it mean lab-made when place curectly.

With the SmartPro it is important to do at least 5 test at different angles. 

All 5 must give the same result of its haabmving a unknown issue. As ever tool has flaws.

Scopes are the most reliable and accuate with the right knowledge of gemstones.

When it says diamond 💎 it means natural. 

Many rubies and other do say CVD / HPHT when a ruby, sapphire, etc, means that it is lab-grown.

When a ruby, emerald, alexandrite, etc, says red error, that lab-made.

Many time labmade is a plastic.

The Presidium diamonds only natural screen, it is only for diamonds, for natural and lla Only.