Sparkless quartz, dark as the stone that fails to ignite.
Iron Flint is a medium brown.
It can be described as medium, moderate, dim and gloomy.
Set in white, because white reads best on it.
Iron is a chemical element; it has symbol Fe and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most abundant element in the Earth's crust. In its metallic state it was mainly deposited by meteorites.
Read on WikipediaFlint, occasionally flintstone (SiO2), is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start fires.
Read on WikipediaNoun