Deposit sites: Brazil, Uruguay, China, India, Madagascar, Mexico, Germany, Botswana, the United States and Taiwan. Variety/Species: Chalcedony Hardness: 6.5 ‘” 7 Zodiacal sign: Scorpio, Taurus, Sagittarius, Gemini Color scheme: blue, […]

Deposit sites: Poland, USSR, Sicily, Burma, the Dominican Republic, Canada, and the United States. China, Baltic coast, and Germany Group: Organic Gem Hardness: 2 ~ 2.5 Zodiacal sign: Leo, Libra […]

Deposit sites: Brazil, Uruguay, Madagascar, India and the United States, South Africa, Japan, Sri Lanka, Russia, Iran, Namibia, and Mexico Variety/Species: Quartz Zodiacal sign: Aquarius, Sagittarius, Pisces, Scorpio, Gemini, Leo, […]

Deposit sites: Australia, Brazil, Burma, Madagascar India, Ireland, Kenya, Sri Lanka, and the United States, Zambia, Russia, and Nigeria Variety/Species: Beryl Hardness: 7.5 ~8 Zodiacal sign: Gemini, Pisces, Libra, Scorpio, […]

Deposit sites: Spain, Brazil, Madagascar, South Africa, France, India, Uranus, and Bolivia. Variety/Species: Quartz Hardness: 7 Zodiacal sign: Leo, Gemini, Virgo, Taurus Color scheme: light yellow to golden brown. Gemstone […]

Deposit sites: Brazil, Russia, China, India, Australia, France and the United States. Variety/Species: Quartz Hardness: 7 Zodiacal sign: Taurus, Cancer, Sagittarius, Gemini Color scheme: light to dark green gray, yellow […]

Deposit sites: Brazil, Madagascar, Southwest Africa, India, and Uruguay. Variety/Species: Quartz Hardness: 7 Zodiacal sign: Sagittarius, Capricorn, Aquarius. Color scheme: black, grayish black Gemstone of the month: February, 7th Wedding […]

Deposit sites: Mediterranean, France, Spain, Tunisia, Morocco, Greece, Algeria, Italy, Taiwan, Japan, Hawaii, Australia, Hong Kong, The Philippines, Indonesia, Vietnam, and China. Group: Organic gem Hardness: 3.5 ~ 4 Zodiacal […]

Deposit sites: Brazil, Madagascar, South Africa, U.S.A. Japan, German, China and worldwide. Variety/Species: Quartz Hardness: 7 Zodiacal sign: Leo, Gemini, Capricorn, Aquarius, Pisces, Taurus, Virgo, Cancer Color scheme: transparent to […]

Deposit sites: Brazil, South Africa, Africa, Russia, India, Australia, British Guiana, China, Namibia, Sierra Leone, and Zaire Variety/Species: Diamond Hardness: 10 Zodiacal sign: Leo, Pisces, Aries, Virgo, Libra Color scheme: […]

Deposit sites: Colombia, Brazil, Rhodesia, South Africa, Zambia, Tanzania,India, Pakistan, Australia, U.S.A. Russia, Afghanistan, and Zimbabwe Variety/Species: Beryl Hardness: 7.5 ~ 8 Zodiacal sign: Cancer, Sagittarius Color scheme: Transparent, light […]

Deposit sites: Australia, U.S.A., Brazil, Madagascar, South Africa, India, Sri Lanka, Greenland, Kenya, Pakistan, Tanzania and world wide Variety/Species: Garnet Hardness: 6.5 ~ 7.5 Zodiacal sign: Scorpio, Aquarius Color scheme: […]

Deposit sites: New Zealand, Germany, Sweden, U.S.A., Australia, Brazil, Spain, Norway, Urals. England, Switzerland, Alaska, and Canada Variety/Species: Iron/Kidney ore Hardness: 5.5 ~ 6.5 Zodiacal sign: Aries, Scorpio, Capricorn Color […]

Deposit sites: China, Burma, Japan, Brazil, Mexico, Tibet, U.S.A., Guatemala, Canada,Taiwan, Russia, and Australia. Variety/Species: Jadeite/ Nephrite jade Hardness: 6, 6.5~7 Zodiacal sign: Capricorn, Pisces, Cancer, Aries, Gemini, Virgo, Leo, […]

Deposit sites: India, Russia, Egypt, Africa, France, Germany, U.S.A., Italy, and Scotland Variety/Species: Chalcedony Hardness: 6.5~7 Zodiacal sign: Gemini, Virgo, Pisces, Aries, Cancer, Libra Color scheme: Brown to yellowish brown, […]

Deposit sites: Afghanistan, Chile, Russia, Siberia Variety/Species: Lapis Lazuli Hardness: 5-6 Zodiacal sign: Capricorn, Virgo, Pisces, Sagittarius Leo Color scheme: blue to dark blue. Gemstone of the month: September, December […]

Deposit sites: Australia, Chile, Europe, Namibia. Romania, South Africa, U.S.A. Russia, Zimbabwe, Zaire, Rhodesia, Egypt, Urals, France, and England Variety/Species: Copper ore mineral Hardness: 3.5 – 4 Zodiacal sign: Leo, […]

Deposit sites: Europe, U.S.A., Japan, Australia and worldwide. Variety/Species: Natural Glass/Obsidianite Hardness: 5 – 5.5 Zodiacal sign: Scorpio. Color scheme: Brown to brownish yellow, gray to black, orange, or red, […]

Deposit sites: Australia, Brazil, Mexico, Tanzania, Poland, U.S.A. Czechoslovakia, Guatemala, Honduras, Japan and Indonesia. Variety/Species: Quartz Hardness: 5 ~ 6.5 Zodiacal sign:Sagittarius, Scorpio, Aquarius, Taurus, Leo, Libra Color scheme:Virtually any […]

Deposit sites: U.S.A., Australia, Brazil, Burma, China, Egypt, Kenya, Mexico, Norway, Italy, Germany, South Africa, and Sri Lanka. Group: Olivine Hardness: 6.5 ~ 7 Zodiacal sign: Leo, Gemini. Color scheme: […]

Deposit sites: West Africa, Brazil, Sri Lanka, South Africa, India, West Australia, and U.S.A. Variety/Species: Quartz Hardness: 7 Zodiacal sign: Gemini, Leo, Libra Color scheme: Brownish yellow to brown to […]

Deposit sites: Brazil, Madagascar, South Africa and U.S.A. Variety/Species: Quartz Hardness: 7 Zodiacal sign: Libra, Taurus, Capricorn, Aquar Color scheme: Light to dark pink. Gemstone of the month: January, 4th […]

Deposit sites: Thailand, Burma, Kampuchea, Sri Lanka, Kenya, Afghanistan, India. Pakistan, and Tanzania. Group: Corundum Hardness: 9 Zodiacal sign: Leo, Scorpio, Capricorn, Cancer. Color scheme: Orange red to purplish red, […]

Deposit sites: Thailand, Burma, Kampuchea, Sri Lanka, Kenya, Australia, India, Pakistan, Tanzania, and U.S.A. Group: Corundum Hardness: 9 Zodiacal sign: Taurus, Virgo, Pisces, Aquarius, Leo Color scheme: Very light to […]

Deposit sites: Brazil, India, Canada, Namibia, Africa, and U.S.A. Group: Felsparoid/Sodalite Hardness: 5 – 6 Zodiacal sign: Virgo, Sagittarius, Cancer Color scheme: Dark blue to violetish blue, often with white […]

Deposit sites: Brazil, Nigeria, Burma, Mexico, Namibia, Pakistan, Japan, Sri Lanka, Europe, Russia, Australia U.S.A. Variety/Species: Topaz Hardness: 8 Zodiacal sign: Sagittarius, Gemini, Leo Color scheme: Colorless, yellow, orange, brow […]

Deposit sites: Brazil, Afghanistan, Burma, Kenya, Madagascar, Mozambique, Pakistan, Tanzania, Russia, Sri Lanka, India, U.S.A. Variety/Species: Tourmaline Hardness: 7 – 7.5 Zodiacal sign: Capricorn, Scorpio, Libra. Color scheme: Virtually all […]

Deposit sites: Australia, U.S.A., Chile, China, Mexico, Iran, Afghanistan, South Africa, Tanzania, and Israel. Group: Kallaite Hardness: 5 – 6 Zodiacal sign: Sagittarius, Aquarius, Pisces, Leo. Capricorn, Taurus, Libra, Virgo […]

中华人民共和国国家标准 养殖珍珠分级 Cultured Pearl Grading 中华人民共和国发布 国家质量监督检验检疫总局 前言 本标准制定时参考了国际珠宝首饰联合会(CIBJO)制定的《珍珠手册»(1995) ，以及美国珠宝学院珍珠分级、日本真珠振兴协会等标准。 本标准由广西壮族自治区质量技术监督局、浙江省质量技术监督局提出。 本标准起草单位:广西壮族自治区质量技术监督局、国家珠宝玉石质量监督检验中心、浙江省技术监督检测研究院、北京高德宝石研究所、诸暨市质量技术监督局、诸暨市珍珠协会。 本标准主要起草人:陆东农、陶金波、曹华松、高岩、何锦峰、王凯志、张国华、罗松、沈一青、张永丽。 1 范围 本标准规定了养殖珍珠的定义、分类、质量因素及其级别、等级指标、检验方法和标识的要求。 本标准适用于养殖珍珠的生产、贸易、质量评价等活动，不适用于经辐照、染色等处理的养殖珍珠的分级。 对于天然珍珠的分级也可参照执行。 2 规范性引用文件 下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有的修改单（不包括勘误的内容）或修订版均不适用于本标 准，然而，鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。 GB／T 16552 珠宝玉石名称 GB／T 16553 珠宝玉石鉴定 3 术语和定义 GB／T 16552、GB／T 16553确立的以及下列术语和定义适用于本标准。 3．1 天然珍珠 pearl 在贝类或蚌类等动物体内，不经人为因素自然的分泌物。它们由碳酸钙（主要为文石）、有机质（主要为贝壳硬蛋白）和水等组成，呈同心层状或同心层放射状结构，呈珍珠光泽。 根据生长水域不同可划分为天然海水珍珠和天然淡水珍珠。 在海水中产出的天然珍珠为天然海水珍珠。 在淡水中产出的天然珍珠为天然淡水珍珠。 […]

Introduction   All gemstone are flawless. What they might have are only birthmarks. We will educate people how to appreciate and enjoy the natural treasures. Our members will not only […]