Zircon. A material occurring in tetragonal crystals, usually of a brown or gray color. It consists of silicon, iron and zirconium, and is harder than the garnet. The transparent varieties are used as gems. The red variety is called Hyacinth; a colorless, pale yellow, or smoky-brown variety from Ceylon is called jargon.
“It is only right that your hearts should be on Christ, when the heart of Christ is so much on you.”
–Isaac Ambrose, Looking Unto Jesus