Sentence examples for a moderately hard from inspiring English sources

Riebeckite is a moderately hard mineral with a glassy lustre.

Holmium is a moderately hard, silvery white metal that is relatively stable in air.

Terbium is a moderately hard, silvery white metal that is stable in air when in pure form.

The preciseness and clarity associated with the use of a moderately hard graphite pencil were developed in the highly selective draftsmanship of the 19th-century French Neoclassicist Jean-Auguste-Dominique Ingres.

Thulium is a moderately hard, silvery white metal that is stable in air but can easily be dissolved in diluted acids except hydrofluoric acid (HF), in which an insoluble trifluoride (TmF3) layer forms on the surface of the metal, impeding further chemical reaction.

It is a moderately hard, silvery metal which readily oxidizes in air and water.

Gadolinium is a moderately ductile, moderately hard, silvery white metal that is fairly stable in air, although with time it tarnishes in air, forming a thin film of Gd2O3 on the surface.

To avoid additional confounding factors, one must also recognize that the stability and physical characteristics of aqueous ENM dispersions can vary as a function of solution type (e.g., distilled water, EPA moderately hard water, or a media specifically designed for a certain test organism).

It is moderately hard, has a glassy lustre, and forms brown, gray, or green crystals or fibres.

USGS hardness (Handa 1964) shows four categories of hardness: soft, slightly hard, moderately hard and very hard.

However, none of the currently serving wells can be classified as such and belongs to either moderately hard or hard category of water hardness.