How Is a Photo Put Inside a 3D Crystal?
By Giftenova Team – Last updated August 27, 2026
Your photo is placed inside a 3D crystal by laser engraving beneath the surface: a 3D model is generated from your picture, and a laser focused inside the solid block forms fine points that together build the image. Nothing is printed on the outside. The picture forms within the optical glass itself.
What “a Photo Inside a Glass Block” Actually Means
It means the image is part of the block, not a layer on it. Hold a 3D crystal up to a lamp and the picture appears to float in the middle of the material, because that is literally where it is. Run a finger over the outside and you feel smooth polished glass, with nothing to catch.
The block itself is lead-free K9 optical crystal, a high-clarity optical glass; our guide to what K9 optical crystal is covers the material in full. That is the key difference from surface-printed photo formats: their image is printed in a layer, and this one is formed inside the block.
Etched, Engraved, or a Picture Inside a Glass Block?
Shoppers describe this in several ways, and they all mean the same process:
- “Etched photo block”: etching usually implies working on a surface, but people use it for this too.
- “Laser photo engraving” or “laser engraved crystal”: accurate, and widely used.
- “Picture inside glass” or “photo in a glass block”: a plain description of the result.
- “Picture inside a glass block”, “glass block with a picture inside”, or “3D picture in a glass block”: the same finished piece named from the glass side; the block is sold as crystal, the material is a clear optical glass, and both word families point at one product.
- “3D photo crystal”: describes the dimensional effect.
You may also see this called subsurface engraving, a term used for engraving beneath the surface of a transparent material rather than on it. If you have seen any of these terms and wondered whether they are different products, they generally are not. One caution: “glass photo block” is sometimes used for a printed wall product instead; our explainer on whether a 3D crystal photo is glass or crystal shows what to check.
From Your Picture to a Finished Block
There are three stages.
1. A 3D model is generated from your picture. Your uploaded photo, an everyday JPG or PNG, is converted into a three-dimensional model; the production software also accepts BMP and AI files. This is the step that turns a flat image into depth information, and it is why a well-lit photo with clear tonal separation engraves better than a flat or heavily filtered one.
2. The laser forms points inside the crystal. A laser focused to a precise position inside the block forms a fine point there. Repeated many thousands of times at different positions and depths, those points build up the picture you see suspended in the material. Because the beam is focused to a point inside the glass, the engraving forms there rather than on the polished outer surface.
3. The block is finished and checked. Each piece is manufactured and laser-engraved to order, and every crystal is inspected before it ships. The checking starts before the engraving does. Every uploaded photo is reviewed before production. If it needs work, we may enhance it or ask you for an alternative picture.
How the Laser Forms the Image Inside the Block
The beam passes through the clear block and is focused to a precise point inside it. Only at that focal point is the energy concentrated enough to form a point, so the picture forms in the middle of the material while the polished surface stays smooth.
Each point the current production equipment forms is under 0.1 mm in size, placed with 0.01 mm accuracy. An image is built from a very large number of these points at different positions and depths inside the block.
The Production Details
The numbers behind the process are the ratings of the current production equipment.
| Detail | Value |
|---|---|
| Laser | 532 nm green laser, 3 W |
| Engraving rate | Up to 6,000 points per second |
| Engraving accuracy | 0.01 mm |
| Point size | Under 0.1 mm each |
| Control | Computer-controlled (CNC) |
| Accepted files | JPG, PNG, BMP, AI |
Those figures describe the point size, the placement accuracy and the operating rate of the equipment.
Why the Engraving Is Clear-and-White
There is no ink anywhere in this process. The points formed inside the glass scatter light, and scattered light reads as white against the clear material around it, which is why the finished engraving is clear-and-white rather than full color.
For how shading works, how the LED stands change the look, and why the effect suits portraits, see our full guide to why crystal engravings are white. If the color of the photograph is central to the gift, a full-color printed format suits it better; our acrylic block vs 3D crystal block buyer guide covers that choice.
When the engraving is 2D instead of 3D
Each block size carries a recommended figure range. If a photo holds more figures than the chosen block can carry at full depth, it is engraved in 2D rather than 3D, which keeps the faces more readable at that size.
The result is still a clear image inside the crystal. It simply does not carry the dimensional depth that makes the 3D effect distinctive. Choosing a larger size, or cropping tighter to the people who matter most, keeps the depth. For how to judge your own photo, see what photos work best for a 3D crystal.
What This Is Not
- Not a surface print. No ink, no film, no coating on the outside of the block.
- Not a photograph placed inside. Nothing is inserted; the block is solid and the image is formed within it.
- Not a sandwich or a laminate. There are no layers glued together.
- Not color. Engraving forms points, and points read white.
Because the engraving sits below the surface rather than on top, the polished outside of the block carries no image layer at all. And because the points are physical structures inside the block, there is no ink layer to fade; see whether the image inside a crystal is permanent for what that means over years of display.
Ready to Try It?
That is the whole process behind this personalized photo gift: one picture, a 3D model generated from it, and a laser that builds the image inside the block. Start your 3D Crystal Photo Block, or read the full 3D crystal photo block guide for sizes, shapes and LED stands.
Process Questions
How is a photo put inside a 3D crystal?
A 3D model is generated from your uploaded picture, then a laser focused inside the solid block forms fine points that together build the image. Nothing is printed on the outside surface. The picture forms within the optical glass itself.
Does the laser damage the outside of the block?
No. The beam is focused to a point inside the glass, so the engraving forms there rather than on the polished outer surface, which stays smooth.
How small are the engraved points?
The current production equipment is rated for points under 0.1 mm in size, with 0.01 mm placement accuracy.
Can a 3D crystal be engraved in color?
No. The process forms points inside the glass rather than applying ink, and those points read white. Our guide to why crystal engravings are white covers shading, lighting, and when a printed color format is the better choice.
What file should I send?
A standard JPG or PNG from your camera roll is fine. Send the original file rather than a screenshot or a social media export, and choose a photo with clear faces and even lighting.
How do you put a picture in a glass block?
A 3D model is generated from the picture, and a laser focused inside the solid glass forms fine points that build the image inside the block. Nothing is inserted and nothing is printed on the surface.