Many people with Ehlers-Danlos syndrome have soft, velvety skin that is highly stretchy (elastic) and fragile. Affected individuals tend to bruise easily, and some types of the condition also cause abnormal scarring.
Quartzite is a metamorphic rock that is formed from the sedimentary rock sandstone. Slate is a metamorphic rock that is formed from the sedimentary rock mudstone. Granulite is a metamorphic rock that is formed from the igneous rock basalt.
In contrast, the metamorphism of quartz sandstone is not very exciting because the parent material contains no other minerals which might react with quartz to produce new metamorphic minerals. The table below gives the minerals and rock name for some other common metamorphic parent material.