What settings are you using?
I have the plain 15 so I point, use the 2x zoom, hold it about a hand length away to get it to focus clearly, take the pic.
Are you using raw mode? Photo style? Pixels? There are so many options to choose, it’s quite boggling if you’re not a photographer.
I just go into the camera app and it’s on the photo setting. I think yours might be fancier because you have the pro with the extra lenses.
I just saw a video on the phone I have, the 15 pro max, and people are complaining that saturation is muted.
If you are not going to use a RAW processor after taking your photos, I think you would be better off not shooting in RAW. The RAW files are very large and are intended for post processing.
Also, doesn't your iPhone 15 have a telephoto lens? I think this would be better than the macro for gems since you will have a greater distance between the camera and the stone.
Shooting RAW allows you to do much more in post processing. Since the file is much larger than a jpg, there is a lot more detail preserved. Here's an example of a RAW image that is 2 stops underexposed and has the color balance set to incandescent light, but the actual light is cloudy daylight from a window near by.
The next image is that file processed with CaptureOne, the color corrected by taking a sample off the 18% gray card the glue is sitting on, and then the exposure increased by 2 stops, and a little tweaking of the levels in the combined RGB channel.
I know, but I don’t like altering photos. I just wish the colors were more true to life from the raw setting.
Thanks for the info though, you certainly know photography.
You shouldn't shoot RAW then. That's the whole idea of RAW. The original raw file will look a little dull compared to if you shot JPG. The camera when you shoot jpg does its own processing to try to make the image look like what you saw. I think you will find your images more saturated and pleasing if you don't shoot raw, leave raw for images you want to do some work with and maybe enlarge. You would need an editor that can handle the iPhone RAW images, not all can. If you have a Mac, then the Photos app on the Mac can, and so can other third party programs like CaptureOne.
Also, it is worth noting that if you photograph in macro mode, the camera will automatically drop the pixels to 12, even though you can use up to increments of 24 and 48.
Are you pictures above cropped, or are you getting that close to the gem?
Which lens of the 3 are you using?
Your pictures look much worse than I would expect from the iPhone 15 pro. A lot of the problem is most likely the light, and you are too close. Get your self one of these very inexpensive light boxes. You only need the 12 x 12 box, I think it's about $33 on Amazon.
Here's a picture with my iPhone 13 mini, in the light box. I did pinch zoom the image about 2x before shooting it. Your phone has a telephoto lens, that's the lens you should be using. The farther from the stone the better.
Notice the gray card in the image. That's an 18% gray used to color balance and expose. You can buy these I'm sure on amazon or any photo shop.