This is very beautiful! I love the concept of using a water with glitter on it. I looked at your other ones too, and also liked it. The colorful effect really makes it seem like jewel, too.
I like this concept, as I have seen zodiac series but never birthstones! But I do think your photos of all the gemstones seem a bit overused. It looks like it was taken by the same water droplet and set, which makes it a bit repeating. Sorry if that doesn't make sense, but it gives me the idea that you're not trying to think of other ideas like putting a water droplet on some other places that are the same color of the birthstone you are trying to recreate. I liked the diamond one because a feather is white and it really looks like a diamond in surroundings that are in its natural color. Maybe instead of just putting a water droplet with glitter on just feathers, you could've put it on a purple flower or something. It looks like you are just taking multiple pictures of the same thing, just at different angles. I wonder if you are...?
Putting that aside, I absolutely love your technique and editing here! The soft glow and the blurry edges give off a dream-like feeling and the little pieces of feather stuck to the droplet reminds me of a cracked gemstone, imperfect but beautiful. I like how you put glitter on water, I have never seen or thought of doing that ever!
Overall, I love it! It's a beautiful work of art that deserves the appreciation it's getting.
Thank you for taking the time to write this critique.
If you look at the time each photo was taken you will see that it's different, so it's not the same water drop and the same setting from a different angle. I actually have a set of several different colored feathers and glitter which I try to combine each time to make a different representation of a birthstone. I do realize they all look similar but the point is in different colors I guess. And of course I could have put the drops on flowers or whatever but then it wouldn't have been a series of water drops on feathers, and that's what I wanted to do..