1 thought on “indian gold jewelry wholesale What are the diamond appraisal agencies?”
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wholesale fashion jewelry rhode island At present, there are four common authoritative diamond appraisal certificates abroad, namely GIA diamond certificates, IGI diamond certificates, HRD certificates, and EGL certificates; two domestic travels are GIC certificates and NGTC certificates. Each diamond certificate comes from different appraisal agencies: NGTC diamond certificate (National Jewelry and Jade Quality Supervision and Inspection Center). NGTC's full name, established in 1992, has long been committed to the promotion and popularization of jewelry vocational education and national jewelry and jade standards. physical properties The diamonds have the highest hardness in natural minerals, and their brittleness is also quite high. It is derived from the ancient Greek adamant, which means hard and inviolable substances, and is a recognized king of gemstones. Diamond. In other words, diamonds are actually a carbon crystal with a very high density. cards, or translation of carats, carats, is the quality unit of diamonds. One card is equivalent to 200 mg. According to legend, the weight of the early diamond merchants' weighing diamonds is a carob fruit (carob) fruit. A fruit of one grain weighs about 200 mg. Because the density of diamonds is basically the same, the heavier the diamond is the larger. The larger the more diamonds, the higher the value of each card.
wholesale fashion jewelry rhode island At present, there are four common authoritative diamond appraisal certificates abroad, namely GIA diamond certificates, IGI diamond certificates, HRD certificates, and EGL certificates; two domestic travels are GIC certificates and NGTC certificates. Each diamond certificate comes from different appraisal agencies:
NGTC diamond certificate (National Jewelry and Jade Quality Supervision and Inspection Center).
NGTC's full name, established in 1992, has long been committed to the promotion and popularization of jewelry vocational education and national jewelry and jade standards.
physical properties
The diamonds have the highest hardness in natural minerals, and their brittleness is also quite high. It is derived from the ancient Greek adamant, which means hard and inviolable substances, and is a recognized king of gemstones. Diamond. In other words, diamonds are actually a carbon crystal with a very high density.
cards, or translation of carats, carats, is the quality unit of diamonds. One card is equivalent to 200 mg. According to legend, the weight of the early diamond merchants' weighing diamonds is a carob fruit (carob) fruit. A fruit of one grain weighs about 200 mg. Because the density of diamonds is basically the same, the heavier the diamond is the larger. The larger the more diamonds, the higher the value of each card.