Dichroscope show whether or not a stone is dichroic (reflects 2 colors). This can be helpful in differentiating stones of the same color from one another. Dichroscopes can be useful with identifying gemstones that are still in the rough and when stones are set and difficult to get to with other instruments. Light entering the dichroscope is broken into two polarized rays that have vibrational directions at right angles to each other. The two images in the dichroscope represent the polarized light and the pleochroic colors signifies doubly refractive stones except if the stone is viewed thru the optic axis. Single color in the dichroscope represents singly refractive stones.
The advantage of the dichroscope is that the two pleochroic colors that may be characteristic of a given direction in a doubly-refractive gem are seen side by side. If no dichroism is identified in the first assessment, the stone can be turned and viewed in other directions. Trichroic gems can also be distinguish and will reveal three colors if the stone is viewed in three directions perpendicular to each other.
- Type : calcite
- Diameter : 15mm
- Length : 60mm
- Body : Metal
- Made in one part, same type like GIA's dichroscope
12 Reviews Hide Reviews Show Reviews
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Worth It for Anyone Serious About Gems
If you’re serious about gemstone identification, this is not optional—it’s essential. It helps reveal properties that you simply can’t see otherwise. Once you start using it, you realize how important it is for distinguishing stones accurately.
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Great Practice Tool Outside the Classroom
I bought this to practice outside of my GIA coursework, and it’s been incredibly helpful. Being able to repeatedly test stones at home has improved my understanding much faster. It’s simple to use, but it teaches you a lot if you take the time to learn.
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Makes Gemology More Visual
One of the things I love about this tool is how visual it makes everything. Instead of relying on theory, you can actually see the optical behavior of a gemstone. It turns something abstract into something very real and easy to understand.
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Perfect for Field Use
I often look at stones outside of a lab environment, so portability matters to me. This dichroscope is compact and easy to use without any setup. I can quickly check stones on the spot, which is exactly what I need. It’s become part of my regular toolkit.
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Sophia Nguyen
I was working with a few stones that looked almost identical, and I couldn’t confidently tell them apart. Using this dichroscope, I was able to see differences in color behavior that weren’t visible to the naked eye. It made the identification process much easier and more accurate.
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Simple, Durable, and Practical
This is one of those tools that doesn’t try to be complicated. It’s just a solid, well-built instrument that does exactly what it’s supposed to do. The metal body feels durable, and the optics are clear. It’s easy to carry around and use anywhere, which makes it very practical.
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Exactly Like What We Use in Class
As a GIA student, I wanted something I could use at home to practice, and this is very similar to what we use in class. The design, clarity, and ease of use all feel familiar. It’s been really helpful for reinforcing what I’m learning, especially when studying optical properties and identification techniques.
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Great Clarity Compared to Others I’ve Tried
I’ve used a cheaper dichroscope before, and the difference is noticeable. The images on this one are clearer, and the separation between the two colors is easier to see. That makes a big difference, especially when you’re trying to detect weaker pleochroism. It feels like a higher-quality optical instrument.
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Small Tool That Adds Real Confidence
What I like most is how fast this tool works. Within seconds, you can tell whether a stone is showing one color or two, and that immediately narrows things down. It’s especially helpful when dealing with stones that look similar at first glance. It adds a level of confidence that I didn’t have before.
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A Must-Have Tool Once You Get Into Gemology
When I first started learning, I thought a loupe would be enough, but this tool showed me how limited that thinking was. Being able to distinguish between singly and doubly refractive stones is a big deal when identifying gems . This dichroscope makes that process quick and intuitive. It’s now one of the first tools I reach for.
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Finally Seeing What Books Talk About
I had read about pleochroism for a long time, but it never really made sense until I used this dichroscope. The moment I looked at a stone and saw two colors side by side, everything clicked. It’s such a simple tool, but it gives you a completely different way of understanding gemstones. The clarity on this one is excellent, and it feels like a serious instrument rather than a toy.
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Who can beat that price for such great gem tools?
This is one of the gem tools that would be very difficult to be without. It really helps to determine the differences between gems that look the same, but are in fact different. It is obvious that it is high quality because if how clear it is and how easy it is to use. Great price too!