Health coverage plus a fund. An Aetna HealthFundÂ® Health Reimbursement Arrangement (HRA)* gives you access to quality care. And it helps you stretch your health care dollars. Our HRA combines an Aetna health insurance or benefits plan with a fund paid for by your employer. This fund helps you pay eligible out-of-pocket health care costs.
Amethyst, a variety of quartz. A mineral is a naturally occurring chemical compound, usually of crystalline form and abiogenic in origin. A mineral has one specific chemical composition, whereas a rock can be an aggregate of different minerals or mineraloids. The study of minerals is called mineralogy.
Defining a mineral. A mineral is a naturally occurring inorganic solid, with a definite chemical composition, and an ordered atomic arrangement. This may seem a bit of a mouthful, but if you break it down it becomes simpler. 1  Minerals are naturally occurring. 2  They are not made by humans.