From a velvety aura to cool magnetic lines, the secret to cat eye nail designs is all in how you move the magnet. Here’s how to get the effect you want—and what to do when you don’t.
Cat eye gel sort of feels like magic. Apply the color; leave as is and it looks beautiful. Bring a magnet close to the nail and suddenly the shimmer starts to take shape.
It’s not actually magic, of course. Cat eye gel contains magnetic particles that respond when a magnet is held near the uncured gel, allowing you to manipulate the shimmer into everything from a concentrated beam of light to a soft, diffused glow. And while the finished effects can look complicated (we’ve all seen the hearts on TikTok and Instagram), learning how to use cat eye gel really comes down to three things: how you apply the gel, where you place your magnet and how you move it.
First, How Does Cat Eye Gel Work?
Unlike traditional gel polish, cat eye gel contains tiny magnetic particles suspended within the formula. Before the gel is cured, those particles can be moved with a magnet. Hold the magnet near one area of the nail and the particles shift, changing where the light catches the surface. The closer the magnet gets—and the direction from which you approach the nail—the more you can manipulate the effect. Once you like what you see, cure the gel to lock the design in place.
That last part is important: Don’t cure until you’re happy with the effect. Until the gel goes under the lamp, you can keep moving the magnetic particles and trying again. But once it’s cured, you’re committed to that design.
How to Apply Cat Eye Gel
Start with your usual nail prep and base coat, curing as directed. Next, apply a thin, even coat of cat eye gel, but don’t cure it yet. This is your working layer.
Bring your magnet close to the nail without touching the wet gel. Hold it in position for several seconds and watch the shimmer move. Reposition the magnet as needed until you've created the effect you want, then cure immediately.
Work on one nail at a time. If you magnetize all five nails before curing, the magnetic particles can begin to disperse and soften the effect you just created. You can use a handheld or mini LED light to flash-cure each nail before moving onto the next. Then, complete a full cure. At this point, you can repeat with a second coat, using the magnet the same way you did on the first coat, to enhance the depth of color or leave as is. Finish with gel top coat, and cure.
There are tons of difference effects you can achieve with cat eye gel even without the magnet. For instance, a dark cream base can make some magnetic effects appear more dramatic, while a lighter or coordinating base can create a softer, more subtle dimensional result. Play around with the different shades and find what works best for each.
One Gel, So Many Effects
The wonderful thing about cat eye gels, beyond their depth of color, is the fact that you can create different designs without having to be an artiste. It’s all in the shape of the magnet and how you manipulate it. Here are some of the most popular:
The Classic Cat Eye
For that signature slash of concentrated shimmer that mimics an actual cat’s pupil, hold the magnet diagonally over the uncured gel. The magnetic pigment gathers into a defined band that seems to shift as the nail moves.
Try this: Change the angle of the magnet from nail to nail. A vertical line elongates the nail visually, while a diagonal line gives you that classic gemstone-like cat eye.
The Velvet Effect
Want an overall velvety glow instead of one defined line? Work around the nail rather than just across the top. Sweep the magnet around the sides and edges of the nail, manipulating the particles toward the center. The result is a softer, diffused shimmer that appears to float across the entire surface.
The Halo
For a luminous center surrounded by deeper color, use the magnet around the perimeter of the nail to push the magnetic particles inward. The result is an almost three-dimensional glow concentrated through the center of the nail.
The French Cat Eye
Magnetic gel can also be used more selectively. Create your French tip with cat eye gel, then magnetize only the tip before curing.
Instead of creating one straight magnetic line, manipulate the shimmer from different points along the sides of the nail to create movement through the center. The goal isn't perfect symmetry. A slight curve or irregular shift in the highlight is what gives the design its fluid, dimensional look.
Meet the 3-in-1 Cat Eye Magnet
Once you understand how magnetic placement changes the effect, having different magnet shapes opens up even more possibilities.
Mia Secret boasts two different magnet kits, each able to create different effects. The original Magnet Set for Cat Eye Gel comes with two rectangular magnets and one large cylindrical. And the newest 3-in-1 Cat Eye Magnet combines three magnetic tools in one, making it easy to experiment with different placements, patterns and levels of concentration without constantly switching tools. 
2 — Cylinder: Best for sharp lines and add attachments for heart-shape designs. Hold the magnet perpendicular to the side of the nail, pushing the particles toward the center; repeat on the other side to achieve a linear effect. Or get crafty with a paperclip: Twist a small paperclip until the ends create a V-shape. Use the magnet to pick it up and hold it over the center of the nail—close, but not touching—until a heart shape appears.
3 — Precision Cylinder: Best for detailed effects. Use this for smaller areas or to create a define French look, holding the magnet close to the nail to create a targeted design.
Cat Eye Gel Troubleshooting
Even experienced nail artists occasionally have a magnetic manicure that refuses to cooperate. Usually, a small adjustment is all it takes.
The cat eye effect isn't strong enough.
Make sure you're working with an uncured layer of cat eye gel and bring the magnet closer to the surface. You want it very close—but not actually touching the gel. Holding the magnet in place a little longer can also help concentrate the magnetic particles. If you find the effect or color payoff is still lacking, repeat with a second coat, holding the magnet in the same position.
The effect looked great, then disappeared.
You may have waited too long to cure. Magnetic particles can continue to settle and disperse after you've moved the magnet away. Once you have the effect you want, flash-cure to ensure your design stays put before a full cure under an UV/LED lamp.
The line looks blurry instead of crisp.
Try bringing the magnet closer or holding it steady for longer. Small, deliberate movements generally give you more control than quickly waving the magnet over the nail.
I don't like the pattern I created.
As long as you haven't cured the gel, you're still in the game. Let the particles redistribute and use the magnet again. You can continue manipulating the gel until you like the result.
My nails don't all look exactly the same.
They don't necessarily need to. Cat eye is inherently dimensional, and slight differences in the placement of the magnetic highlight can make the manicure feel even more interesting. If you do want consistency, keep the angle, distance and placement of your magnet as similar as possible on every nail.
The Best Technique? Experiment.
The fun of cat eye gel is that there really isn't just one way to wear it. A tiny change in magnet placement can transform the same shade from a sharp flash of light into a velvety glow—and layering it over different base colors opens up even more possibilities.
Mia Secret has extensive range of cat eye gels—from the neutral Daydream and Porcelain Atelier collections to the moody Velvet Kiss collection and glittery gunmetal Eclipse—to give you all the versatility you crave. And once you know how to manipulate the magnetic pigment, each one becomes much more than a single color.
So move the magnet. Flip it around. Approach the nail from another angle. Layer your colors. Try it again. Because with cat eye gel, sometimes the best effect is the one you weren't trying to create.