If you still want that high-end Round pearl necklace look, but not the price tag, it is worth the time and effort to seriously consider Near-Round and Button-Shape strands.Ĭhoose Drop-Shaped pearl necklaces if you want to slip into something unique but that still retains a romantic, chic aesthetic. We recommend checking out Akoya pearls, Gem Grade Freshwater pearls and Round Tahitian and South Sea pearl necklaces. If you’re after a strictly “Classic” look, True Round pearls are the way to go. Irritants, sudden changes in temperature and environment, even a parasite infection … this and more can be the reason why a pearl’s formation is disrupted, leading to its final shape.Ĭhoosing the right pearl shape is often a case of “you know it when you see it”, but here are a few tips to point you in the right direction. The muscles of the mollusk’s body gently roll the nucleus around while the pearl inside slowly forms.Īny interruption in this layering process causes variations in the nacre, which then gets “stacked” on top of with successive layers of nacre. round), but variations and irregularities often occur inside the mollusk.Īs the mollusk secretes nacre to coat the bead nucleus inside, the forming pearl begins to take shape. The pearl sac will take the same shape as the bead nuclei (i.e. This round nucleus is inserted into the host mollusk, which then encircles it with a pearl sac. Pearl producing mollusks are usually nucleated with spherical bead nuclei (in the hopes that the resulting pearl will be a perfect Round). Perfectly Round pearls are the rarest and most valuable shape there is! In fact, it hardly EVER works out that way. DiplococciĮxamples: Streptococcus pneumoniae, Moraxella catarrhalis, Neisseria gonorrhoeae, etc.The goal of every pearl farmer is to create perfectly round pearls, but it doesn’t always work out that way. ![]() These group characteristics are often used to help identify certain cocci. Cocci may remain attached after cell division. Cocci may be oval, elongated, or flattened on one side. A special group of spirilla known as spirochetes are long, slender, and flexible.Ĭocci bacteria can exist singly, in pairs (as diplococci ), in groups of four (as tetrads ), in chains (as streptococci ), in clusters (as stapylococci ), or in cubes consisting of eight cells (as sarcinae). Many spirilla are rigid and capable of movement.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |