These rhinestones are made of acrylic and are AB coated giving a beautiful rainbow effect, their Sparkle is amazing and has to be seen to be believed. They are ideal for use in cardmaking scrapbooking wedding stationery and many other craft items the only limit is your imagination I do combine postage for multiple items when they are purchased together and this should happen automatically, if you have a problem just email me before payment I always obtain proof of posting and items are posted on the day of purchase or the following day if bought after 3.00pm and I will notify you by email when I have posted your parcel so you know when to expect its arrival I will leave feedback for you once it is left for me. Please DO NOT leave negative feedback, if you have a problem contact me first I