A magic loop is the shape formed by the lines that connect to numbers which add to give the magic sum. While a magic square contains numerous magic loops, there are only two that contain prime numbers only:  {2, 3, 5, 11, 13}  &  {3, 7, 11, 13}. The simplest of these is the prime loop.

The prime loop of the given 4 x 4 Magic Square is shown below.

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The Prime Amulet is when the first and final numbers of the prime loop are connected.

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Aries

Prime Loop

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Amulet

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Taurus

Prime Loop

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Amulet

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Gemini

Prime Loop

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Amulet

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Cancer

Prime Loop

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Amulet

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Leo

Prime Loop

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Amulet

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Virgo

Prime Loop

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Amulet

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Libra

Prime Loop

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Amulet

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Scorpio

Prime Loop

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Amulet

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Sagittarius

Prime Loop

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Amulet

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Capricorn

Prime Loop

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Amulet

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Aquarius

Prime Loop

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Amulet

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Pisces

Prime Loop

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Amulet

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Amulets of the Zodiac

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