Have you ever noticed the term “Fluorescence” on a GIA Diamond Grading Report? Did you know that some, but not all, diamonds show effects under ultraviolet light?
For most people who purchase diamonds, fluorescence will be a non-issue, but some might be confused by the term. Below are commonly asked questions, and helpful answers from GIA researchers who have studied fluorescence in depth. (more…)
When it’s time to buy a diamond, many people spend a lot of time educating themselves on the 4Cs of diamond quality, and then determining what the personal trade-offs between those various quality characteristics will be. (more…)
The garnet is actually a group of several minerals that have been used since the Bronze Age as gemstones and abrasives. There are six common garnet minerals – and several other rare species. The most common garnets are almandine, andradite, grossular, pyrope, spessartine and uvarovite The name “garnet” comes from 14th century Middle English word gernet meaning ‘dark red’, (more…)
Contrary to what many people may think, the word “synthetic” does not mean fake when it comes to gemstones. The term actually comes from the Greek word for “to put together.” People “build” or, more accurately, “grow” synthetic crystals. (more…)
Diamonds are famously known for being one of the hardest substances on earth – we know you’ve heard the rumor that a real diamond can cut glass. But do you know why diamonds are so hard? (more…)
GIA strives to make sure diamond grading is objective and fair, keeping a standard in the diamond market, so that the public can buy a diamond with a GIA report and know that the report is accurate and absolutely impartial. This creates the ultimate peace of mind for your diamond purchase. (more…)
Zultanite is an extremely rare gemstone used in jewelry design, and was a popular choice at the 2011 Couture conference, which features the most unique, innovative and inventive jewelry design. Famous jewelry designers such as Stephen Webster, Erica Courtney and Rhonda Faber Green all incorporated zultanite into their collections. Zultanite changes color in light, ranging from a kiwi green with flashes of yellow in sunlight conditions to raspberry hues in candlelight. (more…)
When men and women really start looking into diamond grading, a common question is, “Why does the GIA color grade start with a D?” (more…)
Solitaire Setting
Solitaire Setting is a popular diamond engagement ring setting. The head secures the diamond. The prongs allow the diamond to catch the most light. A four-prong setting shows more of the diamond, but a six-prong setting is often more secure. (more…)
Sometimes the search for the perfect diamond grows into something deeper—a lasting interest in the jewelry and gems. If that’s happened to you, discover how GIA can guide your path toward a Graduate Gemologist (G.G.) or Accredited Jewelry Professional (A.J.P.) diploma, courses in gemology and jewelry arts, and a career in the industry. (more…)
Synthetic diamonds are grown in a laboratory and have essentially the same chemical composition and crystal structure as natural diamonds formed millions of years ago. In the last 30 years, gem quality synthetic diamonds have been grown in Japan, South Africa, Russia, Ukraine and the United States. Synthetic diamonds are generally produced using either High Pressure/High Temperature (HPHT) or Chemical Vapor Deposition (CVD). (more…)
When you oooh and ahh over a sparkly diamond, to a large extent you’re reacting to its cut. What you want is light to enter through the crown table (the flat part at the top) and go to the pavilion (the pointy part at the bottom), where it reflects from one side to the other, and then back out of the diamond through the crown table. This ensures maximum sparkle and brilliance. Think spectacular laser show! (more…)
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