Despre perle

1. Perlele naturale – un mecanism de aparare, de refacere

Wiki: “A pearl is formed when the mantle tissue is injured by a parasite, an attack of a fish or another event that damages the external fragile rim of the shell of a molluc shell bivalve or gastropod. In response, the mantle tissue of the mollusk secretes nacre into the pearl sac, a cyst that forms during the healing process. Chemically speaking, this is calcium carbonate and a fibrous protein called conchiolin. As the nacre builds up in layers of minute aragonite tablets, it fills the growing pearl sac and eventually forms a pearl. It is a myth that a grain of sand or grit can cause a pearl to form, as nacre will not adhere to inorganic substances.

Natural pearls are those pearls that are formed in nature, more or less by chance. Cultured pearls, by contrast, are those in which humans take a helping hand. By actually inserting a tissue graft of a donor oyster, a pearl sac forms, and its inner side precipitates calcium carbonate in the form of nacre.”

 

2. Culturile de perle – scoici ranite

“The Pearl King”, cum a fost supranumit Kokichi Mikimoto, a fost omul cu o viziune si o imaginatie infailibila, cu o vointa extraordinara de a-si indeplini visul: culturi de perle cu aspect perfect natural.
Totul se intampla la sfarsitul secolului al XIX-lea, cand perlele naturale erau de la an la an tot mai putine, iar cererea tot mai mare. In 1888, Mikimoto a fondat prima ferma de perle, in insula Shima, moment in care a si-a pus problema daca nu cumva perlele ar putea creste artificial din vreme ce printre mii de scoici nu se gaseau decat una sau doua crescute in mod natural. Intalnirea cu o autoritate in domeniul biologiei marine, prof. univ. Kakichi Mitsukuri, a fost determinanta. Acesta a afirmat ca “daca un obiect strain intra intr-o scoica si aceasta nu il expulzeaza, sideful incepe sa acopere obiectul si in cativa ani va creste o perla cu un corp strain ca nucleu”. Dupa o lunga perioada de studii, incercari, dezamagiri, in iulie 1893, sotia lui Kokichi, Ume, culege prima perla crescuta artificial. Timpul a dovedit ca aceste perle erau egale ca si calitate si proprietati cu cele crescute natural.

Sunt frumoase, nu zic ca nu.

Dar parca e ca si cum ai purta durere la gat, lacrimile saracelor scoici ranite.

 

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