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.
1 A mineral is an element or chemical compound that is normally crystalline and that has been formed as a result of geological processes (Nickel, E. H., 1995).  Minerals are naturally-occurring inorganic substances with a definite and predictable chemical composition and physical properties.. (O' Donoghue, 1990).