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Nekoxo
Since: Dec, 2017
4th Dec, 2017 01:08:08 PM
I think the one you're talking about is called Secret of Cerulean Sand in English. I have been looking for it as well as I watched it when I was younger and I happened to stumble upon it again recently.
I hope this helped!
This animation was aired about 10 to 13 years ago. I watched this in France. This animation was about a teenage girl who has two older brothers; one of them is a step brother, and both of them go missing after they leave the house for business. One of the brothers sends a letter with a blue stone in it. When the girl drops tears on it, it changes to blue dust. After this happening, this girl decides to go on an adventure to find her brothers with accompany of one of the butlers. She eventually meets her step brother but later realizes he was doing a business related to the blue stone. She later meets the other brother and tries to block the step-brother's business, which eventually leads to a destruction of the whole business. During this destruction, the two older brothers sacrifice to save this girl from the destruction. After this incidence, she goes back home and starts her normal life again. She eventually succeeds in making a hang-glider and flying, and the animation ended here. This is the summary of the animation that I remember. I am sorry if some of it is weird because these memories are from more than 10 years ago, so they are all kind of blurry. One of the main features of this girl was that she had a pink brooch she got from her step mother and kept the blue stone in it. I don't know whether I have given enough info, but if anyone knows what this anime is, I would be grateful.