Price and Where to buy?
GOLDEN STUDS! They are looking absolutely GORGEOUS!!! I'm so glad that I have it ^___^. I purchased a bag with golden squared studs which are 4mm. You can purchase it at http://www.bornprettystore.com/product_info.php?ref=244&products_id=2857&affiliate_banner_id=1 for $5.84. Make sure to use my code MDJ61 to get 7% OFF of your whole purchase :D! They have tons of other studs (silver and gold) of different sizes so check it out on their website: http://www.bornprettystore.com/index.php?ref=244&cPath=242&affiliate_banner_id=1.
It's quite flat, which makes it easier to keep it on its place. I've used nail glue and the studs stayed on my nails for a few days (more than 3 days!).