Archiwa tagu: Łańcuszek z różowego złota 18 tys. Powstawanie i pozyskiwanie pereł

Łańcuszek z różowego złota 18 tys. Powstawanie i pozyskiwanie pereł

Nucleated pearls are divided into two parts, the nucleus and the nacre, from the inside to the outside. The innermost layer is the nucleus. The nacre is a crystal of keratin and calcium carbonate formed on the surface of the pearl nucleus or foreign body by the secretions of the pearl oyster during cultivation or […]