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.
Gypsum may be used as a calcium fertiliser, but it may not be the product of choice. Lime should be used on acid soils that are low in calcium. calcium, it also corrects acidity (raises the soil pH). acid soils, it is ineffective in neutral and alkaline soils. not need amending is 1 â 2.5 t/ha.