Sea urchin shell is called a “test”
See urchins, which are echinoderms, are a sun symbol because of their many spikes. The Celts called sea urchins “serpent’s egg”; a symbol of life-force and the primordial seed.
Sea Urchin — Teaches discernment and the art of underlying circumstances. Slow and methodical, it shows how to manoeuvre with tenacity and patience. Nothing is impossible when Urchin is guiding you. Care of your feet, physical movement and grounding properties hallmark Urchin’s meaning. Pay attention to the colour of the Sea Urchin for this will aid in understanding.
*SHEPHERD’S CROWN, SEA URCHIN: The fossilized shepherd’s crown, or sea urchin, is heart-shaped, with a five-pointed pattern on the top. It may have also been known as the glane-stone of the Druid’s. It was used to avert the evil eye and bad luck.