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Yes it is.

Sacred Geometry of the Nautilus Shell.

The Chambered Nautilus is a living fossil that has survived in Earth’s oceans for the last 500 million years. Existing before there were fish, dinosaurs, or mammals, the Nautilus could grow up to six meters long and was a predator in the ancient seas.

The main feature of the Nautilus is the large snail-like shell that is coiled upwards and lined with mother-of-pearl. The shell is subdivided into as many as 30 chambers. As the shell grows, its body moves forward into the new larger chamber and produces a wall to seal off the older chambers. The empty chambers are used to regulate buoyancy. A cross-section of the shell of the Nautilus will show the cycles of its growth as a series of chambers arranged in a precise Golden Mean Spiral.

The Golden Mean is represented by the Greek letter Phi (with the decimal representation of 1.6180…), and is one of those mysterious Natural numbers that seems to arise out of the basic structure of our Cosmos. Phi appears regularly in the Realm of things that grow and unfold in steps just as the Nautilus shell grows larger on each Spiral by Phi.

With each revolution completing a cycle of Evolution, the Golden Mean Spiral is Symbolic of Lifes unfolding Mysteries. The continuous curves of the Spirals, which are Feminine in Nature, and the Ratios between each of the chambers reveal the intimate relationship between the Harmonics of Nature and Sacred Geometry.