Carbuncle. A beautiful gem of a deep red color (with a mixture of scarlet), found in the East Indies. When held up tot he sun, it loses its deep tinge, and becomes of the color of a burning coal. The carbuncle of the ancients is believed to have been a garnet. The name is now given also to the ruby sapphire and the red spinel. The ordinary carbuncle is a garnet cut en cabochon.

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“Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is – his good, pleasing and perfect will.”
– Romans 12:2