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.

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“God has no better way to make us value his love, than by withdrawing it awhile. If the sun shone but once a year, how it would be prized!”
–Thomas Watson, A Divine Cordial