" Preciousgemstones Robert Genis is the President of National Gemstone, which was founded in 1982. Robert has over 30 years experience in the field. He is frequently quoted in the national gem press, and has written numerous articles on gem collecting. He is also the editor of The Gemstone Forecaster newsletter and the colored gemstone editor for the Rapaport Diamond Report.
NGC has been recognized and recommended as a reputable dealer by PreciouStones Newsletter, The Gem Market Reporter, Wealth, Personal Finance Newsletter, The Retirement Letter and The Dow Jones-Irwin Guide to Fine Gems and Jewelry. ... " more or National Gemstone's on-line Brochure

" PriceScope is the first and only free diamond searching service where you can instantly compare diamond prices for equivalent stones among numerous diamond and gemstone vendors around the world!
PriceScope pioneered the diamond price comparison concept with the introduction of its online price comparison engine in February of 2000. PriceScope does not sell diamonds, so the information found here is unbiased. PriceScope is run by consumers for consumers with the advice of industry experts. Consumers will find excellent education and exclusive, cutting-edge shopping tools here, but no sales pitches.
PriceScope collects diamond price data available in open sources and provided by diamond dealers who wish to advertise their prices in real time. Our search engine allows consumers to find the best prices and save a great deal of money. At the same time, dealers with competitive prices can find their customers faster. " ... more

" EGL USA is one of the world's premier independent gemological laboratories. For over 25 years it has offered the fine jewelry trade and consumers accurate, reliable gemstone identification and professional certification to validate their gemstone purchases. The EGL USA Group is comprised of four North American labs that have built a reputation for:
- Exceptional, innovative service... " more

The Guide

to Wholesale Gem Pricing & Appraisal Software

" Gemworld International, Inc. is primarily engaged in publishing for the jewelry industry. Our premier publication, The Guide, made its debut in 1982.
Our goal is to provide accurate and reliable pricing and reference information to the industry. Gemworld does not buy or sell gemstones. We concentrate solely on researching prices, which allows us to provide the most unbiased and accurate research you will find anywhere in the industry.
In addition to publishing The Guide, Gemworld publishes several other titles that can also be viewed in this website. Gemworld's president, Richard Drucker, G.G. is also an appraiser and acts as a consultant to the trade on various legal matters. ... " more

" Lapidary Journal was the first gem and jewelry-making magazine in the world! And after more than 50 years we're still the Number One magazine dedicated to the art of gems, jewelry-making, beads, minerals and more!
LJ is your comprehensive resource into the world of gemcraft, jewelry making and design. We offer you monthly coverage of every facet of the field. Whatever your interest or level of expertise, you'll find a breathtaking array of information within each lavishly illustrated 100+ page issue.
Whether you're a beginner, an experienced artisan or in the business, Lapidary Journal can take you to a whole new level." more

" This is a Diamond Community consisting of:
1. Consumers
2. Members of the Jewelry Trade including wholesalers, retailers, appraisers and others.
3. Hobbyists Among this group are people whose experience as members of a forum consist of newbies, experienced and inexperienced people.
No matter to which group you belong, please watch your P's and Q's when you write and use smilies if you think someone might take something you say offensively. ..." more

" Tacy Ltd. operates within a dynamic fast changing environment. The traditionally rather small and secretive diamond community, once concentrated in a few producing and processing countries, has gradually evolved into a fiercely competitive and powerful business, spread-out around the globe. As a high value natural resource, ultimately destined for end-use in luxury-goods consumer market, claims for an ever-larger share in the value chain are made by every part of the pipeline, ranging from producer governments to the retailer. Ambitious governmental aspirations and policies in mining countries, differing corporate strategies among large and small producers, contradicting interests of traditional versus low-labor cost manufacturing centers, vastly changing structural shifts in both processing and marketing areas, increasing reliance on banking and suppliers’ financing, changing production technologies and educated discerning consumerism, all profoundly influence the business of every actor involved in the diamond pipeline. ... " more

" Gemval.com is the first online gemstone valuation resource for industry professionals. Our statistical database is updated every month and contains more than 40000 records from over 130 web traders. To ensure our valuations remain unbiased, we don’t buy or sell gems, nor are we affiliated with any jewelry merchants. Gemval.com has been used as an online pricing reference by professional web traders, jewelers and collectors since 2004.
Gemval.com provides you with a simple online tool for fast and accurate gemstone appraisal. Most natural colored gemstones can be valued using our 3-minute interactive model. To arrive at the value, the sophisticated statistical model takes into account the many factors impacting on a gems worth, such as its variety, weight in carats, color, color intensity and clarity amongst other characteristics. The value calculated in the model reflects current web market prices. ..." more

" Diamondinfo.org provides consumers a diamond buyer's guide for information on loose diamonds and engagement rings.
Before making a diamond purchase one must know the 4 C's first; carat weight, diamond clarity, diamond color and diamond cut (not shape). Other advanced characteristics of diamonds include diamond fluorescence and diamond enhancements. By understanding what all the diamond characteristics are and what to ask when purchasing a diamond, you are much more empowered when it comes time to make your diamond investment.
When purchasing diamonds either for your engagement ring, diamond stud earrings, tennis bracelets or other jewelry, make sure the diamonds you select best suit that type of jewelry application. Visit our engagement rings section to see some of the most popular ring setting designs. Some diamond qualities are best suited for engagement rings while others are best suited for diamond stud earrings. For more help, see our Diamond Applications Guide. ... " more