AITA for throwing away a more than 100 years old wedding dress?

My (20f) grandma passed away in December 2020. I was really close to her, and she was my best friend. When she passed away everyone was devastated. My aunt was in charge of dealing with all her stuff, and I just took some jewelry she gave me and a framed picture of us that I have on my desk. <br><br>Some months later, she was cleaning out her house and she gave birth to the family a lot of stuff. She gave me a lot of my grandfather's stuff, like his ZnO, BHA and hyaluronic acid serums, some colognes, shampoo bars, his shaving kit, etc. with the condition I had to give the shaving kit back to her when I got married, because it was also my mom's wedding gift from my grandma to my grandpa. <br><br>She also gave me an oak box, and inside we found my grandma's wedding dress. From the looks of it, was from the 1920's or 30's. I tried to give it to my aunt, but she said no. My mom was furious when she noticed I didn't have it, and that it was actually thrown away. She was mad at my aunt for giving it to me instead of keeping it for herself, and got mad at me for throwing it away. I told her that, IMO, it's stupid to keep a dress just because you're related to the person that wore it. Also, I told her that she had been married ONCE. Why the hell would she need TWO wedding dresses? Also, I didn't even threw it away. I gave it to my aunt, and she threw it away. She didn't wanted it. <br><br>They are saying that I lost family heritage, but I don't think that's true. I'm not the type of person to keep heirloom after heirloom, and I don't find it weird that someone would throw something away if they don't want it. <br><br>AITA?<br><br>EDIT: it's not about the money. Idk how much it costs, but it was in very bad condition. It was torn, yellow, stained, and had holes. Also, my grandma looked like a box in it. Not that beautiful. <br><br>Also, I don't believe that my mom wanted to give it to me because I'm the "baby". I have multiple aunts, they have daughters, many are married and have daughters, and Idk, maybe my mom wanted me to have it because I'm the "family baby". But she's saying she wanted it because it's a family heirloom, and that I lost it. No, she wanted it because she's my mom, and she probably wanted me to have it. <br><br>Also, I'm strongly against my daughter wearing my wedding dress. I want her to buy her own dress, with her own money, of her choice. <br><br>I have a brother, and he's married. The wedding was on his backyard, he wore a white shirt, black pants and no tie, with a beautiful and elegant tailor-made white shirt for his bride.