The glyphs, upon touching his skin, seemed to fade off of the bracelet. Jon doubled over with... not actually pain, but a lot of discomfort. Muscles cramping, sudden nausea, feelings of pins and needles and numbness. He felt something clenching in his chest and his skin felt stretched out. Something was happening to his body... but what? Visions streaked through his head of all the science fiction movies and TV shows he had ever seen--he could have become a werewolf, or a sea creature, or he could be turning to stone.
Of course, when the sensations in his body subsided and he could take stock of his body, that wasn't what happened, and a mirror only made it more obvious. He had felt his body shifting, his breasts growing, his genitals rearranging. He was a girl now, a teenager just like himself, a bit shorter. His hair and nails were the same and he was clean-shaven anyway.
"Dammit, what happened?" he thought. "I'm a girl. That bracelet did something... oh, no. I had these thoughts that it was feminine. Could it have read my mind and did this to me?"
He raised his arm to look at the bracelet. It was there, but it wasn't the same. All the glyphs were gone. He tried taking it off to see if it made any difference, but it didn't. He tried rubbing the skin near where it was, which didn't help. He tried putting the bracelet on the other arm, which didn't help either. After a few more random attempts to make the bracelet do something when he had no knowledge whatsoever of how or why it did anything the first time, he gave up and put the bracelet in a drawer. He'd have thrown it away in disgust if it hadn't been several ounces of gold.
Jon's T-shirt was large on his thinner form despite the breasts. His briefs were loose and his jeans felt ready to fall off, though it couldn't have been even an inch of difference. It was scary--this was magic. There was no such thing as magic--at least, in all his 16 years of existence he had never seen any, heard of anyone who saw any, or seen magic on a news broadcast. Anyone who could change someone into a girl could do... well, anything imaginable. Or maybe all magic left the world a thousand years ago and only this one artifact was left....
Jon went over to his closet and found a shirt and pants which had no longer fit him... which meant that now, they did. The same went for his shoes. He'd have to be braless for now, and he was sure that his hair would be considered not stylish and boyish, but he didn't exactly care.
He was about to yell out for his parents until he realized that first of all, they weren't home at the moment, and second, how could he convince them who he is?