The cartilages are placed horizontally above each other, separated by narrow intervals. They measure about 4 mm in depth and 1 mm in thickness. Their outer surfaces are flattened in a vertical direction, but the internal are convex, the cartilages being thicker in the middle than at the margins.
A synthetic analog is a: synthetically created compound that differs from the Natural compound. Both in it's structure and function. Although probably very similar to the original compound.
The differences between them are subtle, but very important. Synthetic refers to a manmade material with essentially the same chemical composition, crystal structure, and optical and physical properties as the natural gem material. There are also materials that simply look like natural gems. These products are called simulants or imitations, and can be either natural or manmade.