u/Hellboy216

I know nothing about marbles but I was wondering if anyone could tell me anything about this one. It looks black but when you shine a light on it, it appears pink.

Starting weight was 138lbs and today I weigh 158lbs. I’m eating 3k calories a day and hitting the gym 5-6 days a week. Diet is pretty much whatever I want to eat as long as I’m hitting my calories, carbs and protein.