Gemstones associated with metamorphic rock include beryl, jade, lapis lazuli, turquoise, spinel, ruby, sapphire and zircon. Rocks and minerals are in a constant state of change, which is referred to as the rock cycle. Igneous rock can change into sedimentary or metamorphic rock.
Lime is a soil amendment made by grinding limestone, a naturally occurring type of rock that is very high in calcium. Two types of lime are commonly used in lawns and gardens, agricultural lime and dolomitic lime. Agricultural lime, also sold as garden lime, is made from calcium carbonate.
Lime can be applied to a lawn any time of year that soil isn't frozen, but it is typically done during spring or fall. It's best to apply lime after aerating the lawn. This aids absorption and allows some of the lime to reach deeper into the soil. 1  Lawn Care Tools. 2  Lawn Care Tips. 3  Landscaping Basics. 4  Gardening Tips. 5  Lawn Care Basics. 6  Gardening Basics. 7  Lawn Care Basics. 8  Lawn Care Tips.