Gresco Die Stone is a stone that is formulated to be very hard. Compression strength tests prove that this die stone meets or exceeds the hardness of the top brands. Setting expansion is approximately .13%. The color is pink and this is a super fast set stone, so the initial set time is about 3 minutes. It works great for rush cases when every minute is crucial. All of our die stone and lab stone products are based on proprietary formulas developed by Gresco Products and made here at our facility in Stafford, Texas. Because of our exacting manufacturing and blending techniques we are able to offer a good, consistent product. 50 pounds per package. Made in the USA.