1. to inject or implant (a vaccine, microorganism, antibody, or antigen) into the body in order to protect against, treat, or study a disease. 2. to affect or treat (a person, animal, or plant) in this manner. 3. to introduce (microorganisms) into surroundings suited to their growth, as a culture medium.
925 is a standard sign used to mark sterling silver, and the meaning of the stamp is that the silver content in the piece is 92.5% (i.e., the remaining 7.5% is comprised of other elements). Perhaps because the âgoldâ jewelry you are looking at is not actually made of gold.
Pure gold is so soft it is rarely used in jewelry. Jewelers deal with various gold alloys, collectively called karat gold. Karat (K) tells the number of parts, by weight, of gold in 24 parts of alloy. The higher the percentage of pure gold, the higher the karat. Pure gold is 24K; 18K is 18 parts fine gold and 6 parts metal; 14K is 14 parts fine gold and 10 parts metal; and 10K is 10 parts fine gold and 14 parts other metal. A diamond certificate is a report that attests to the authenticity of a diamond.