Indiana Cut Stone Limestone Sill Stock. Limestone sills are produced as a simple rectangular shape from mill run quality Indiana limestone. Our limestone sills have a diamond sawn finish and come in three standard course heights of 2-1/4, 3, or 4. We offer standard sill depths from 4 This ledge is most well-known Kansas limestone. Cut Finish. Standard Cuts. We stock a variety of standard sizes and will custom cut to meet your needs. Stone Slabs. We are able to custom produce large slabs up to 8 x 20 feet. Flint Hills Blend. Our spin on the landscape x 8 retaining wall block. A unique combination of 3, 6, 9 ... IBC offers IBC-Lansing Cut Stone as your preferred provider of Indiana Limestone, Americas Building Stone. A natural quarried product, Indiana Limestone is known for its structural performance, durability and timeless beauty. Matched with the talents of our experienced stonecutters, let IBC be a part of your next project.