Strictly speaking, natural pearls are those created without any human intervention whereas cultured pearls require human intervention.

Natural pearls form without human assistance -- when a foreign object, such as a parasite or piece of shell, accidentally lodges itself in an oyster's soft inner body where it cannot be expelled. This happens so rarely that, today, nearly all natural pearls one sees are in estate jewelry collections. See similar questions...

Cultured Pearl is the birthstone for June. Cultured pearls are the beautiful and affordable alternative to scarce natural pearls. Both are organic in nature and derive their beauty from their iridescent aura. In fact, the only sure way to distinguish cultured pearls from natural pearls is to x-ray them. Nearly all cultured pearls are treated to enhance their colors through bleaching, dyeing or safely irradiating them. See similar questions...

A Tahitian Cultured Black Pearl is a pearl that is obtained by means of a grafting operation performed by a skilled technician on the "Pinctada Margaritifera" or "Black Lipped Oyster" of French Polynesia. See similar questions...

The black-lipped oyster found in French Polynesian waters naturally secretes a dark pigment which, depending on the quantity, gives the resulting pearl a basic color ranging from steel gray to black. See similar questions...

Alexandrite: Because of the price and often limited availability of genuine Alexandrite, this mfr. uses Green Tourmaline to represent the green color of Alexandrite. (Alexandrite is a color-change stone.) Green Tourmaline however is more of a medium to medium-dark olive green color. Opals or Cultured Pearls: Opals are cabochon-shape stones... they are domed with no facets so when set they look different when compared to a faceted stone when viewed from the top and the side. See similar questions...

Natural' often is misrepresented in product labeling to imply 'healthful,' but 'natural' only means that the product has undergone minimal processing. Unlike products that are certified organic, natural products have no certification or inspection system. Also, 'natural' does not necessarily relate to growing methods or the use of preservatives. See similar questions...

Natural hormones are, in fact, bioidentical hormones. The fact that the bioidentical hormones come from natural plants (soy or yam plants) does not make them bioidentical. From there they are taken to a chemical plant where they are further processed into the bioidentical forms. They are further tested for bioidentical purity, so that when a compounding pharmacy receives these products they are ready to be compounded into different dosage forms. See similar questions...

A "pearl" is typically a dry powder that can be added to a multitude of paint products. Pearls come in dozens of colors, and they are the consistency of baby powder. Spraying a white base, followed by a blue pearl, and then clearcoat, will give you a white finish that has a pearl-blue haze/hue when seen at certain angles. See similar questions...

Wholly natural. Brewer's yeast may be the best source of the vitamin-B complex, so Marmite is rich with natural vitamin-B, as well as riboflavin and niacin. See similar questions...

Definition: A natural bridge is a type of natural arch. In general, a natural bridge is distinguished from other types of natural arches by having one or more of the following attributes: a current of water, such as a stream, clearly was a major agent in the formation of the opening (hole) [genetic] it has the general appearance of a man-made bridge, e.g., a flat, level top over an arched opening [anthropomorphic]. See similar questions...

Organic cotton is grown without the use of chemical fertilizers or pesticides. Additionally, the Royal-Pedic Organic Cotton Mattress, the Royal-Pedic Organic Natural Latex Mattress, and the Royal-Pedic Organic Cotton Crib Mattress are manufactured without the use of formaldehyde, glues, dyes, resins, polyurethane foam, or synthetic latex. See Royal-Pedic Premium, Natural Materials to learn more. See similar questions...

My Glycerin Soap is made from a base, commonly referred to as "Melt and Pour," among soap crafters. I use an all vegetable oil base to which I add fragrance oils (some people are allergic to fragrance oils), mica and/or liquid colorants, and/or non-toxic soap paint. My All Natural Soap is handmade by me using various oils, butters, water, lye, botanicals, and essential oils. This soap is 100% all natural. See similar questions...

Turquoise is found in many semi-arid regions of the world. It has been a highly prized gemstone for thousands of years. All turquoise mines produce a wide range of quality and beauty. Only about 10% of the total turquoise production of any mine is the highest quality natural "high grade" (cost at $200 per pound and up). Another 30% to 40% is hard enough to use in good handmade jewelry. See similar questions...

Natural Leather = Unfinished Leathers = More natural characteristics / shading differences Protected Leather = Finished Leathers = Less natural characteristics / More uniformed look See similar questions...

The body naturally produces three main forms of estrogen: estrone (E1), estradiol (E2), and estriol (E3). Estrone is converted from estradiol in the liver. Synthesized in the ovaries and metabolized in the liver, estradiol is the most physiologically active form of estrogen. When taken orally, estradiol is converted into estrone in the small intestine. Estriol is the shortest-acting estrogen and has a weaker effect than estradiol and estrone. Estriol remains intact when supplemented orally, i.e. See similar questions...

same BTU rating as propane gas. Liquid propane gas contains 2,500 BTU's per cubic foot, natural gas contains 1000 BTU's per cubic foot. In addition, natural gas comes into your home through a pipeline from a local supplier. Propane is stored in a tank. See similar questions...

Antique finish - a dark background brings out the polished details. It is the most popular finish. Black antiquing is available for Valadium, Silver Select and White Gold only. Natural finish is as beautiful as the antique finish, but without the dark background. This option is lovely with more subtle detailing, and is available on 10Kt, 14Kt, and 18Kt gold. See similar questions...

Organic agriculture is based upon a systematic approach and standards that can be verified and are recognized internationally. Natural foods, on the other hand, have no legal definition or recognition, and are not based on a systematic approach. While natural products may generally be minimally processed, there are no requirements to provide proof, leaving open the possibility for fraud and misuse of the term. See similar questions...