Search Results
Fine Jewelry University Articles matching: “Cushion lab”
Showing only FJU Article results. Click here to show all results.
Fine Jewelry University (Show All FJU Articles)
-
Gem in the Spotlight: Jade
… a big impact on how gems are worn and what they can handle. We all know diamonds are the hardest gem commonly available on earth. If you scraped them together, a diamond would scratch a piece of jade while the much softer jade wouldn’t … the years are chrysoprase, serpentine, maw sit sit, and hydrogrossular garnet. For a short amount of time, a few laboratories produced synthetic (lab-created) jadeite. This proved to be unprofitable and was quickly forgotten; however, a…
-
Star White Gold
… white gold has been developed with the consumer in mind since some people who enjoy the high fashion look of white may have sensitivity to the nickel in white gold. Star white gold has been evaluated by a leading independent testing laboratory. The Star White gold family of alloys does not require rhodium plating. They have been color tested by the American Assay & Gemological Office, a division of BAO Technical Services Ltd., the most authoritative testing source…
-
Synthetic Gems: The Whole Story
… and an extremely careful examination of the gem. Some synthetics are poorly made and can quickly be identified. Other synthetics are so well made it is impossible to id them in jewelry and can only be positively identified in gem labs with millions of dollars worth of equipment and world class personnel. Synthetic diamonds on the high end and synthetic quartz on the low end are both very difficult to positively identify as synthetic. Both, I feel, are impossible to …
-
How to Tell If a Diamond Is Natural or Lab Grown
…’s not as simple as you might think. First, you have to decide what “real” means. If you are not familiar with lab grown diamonds, you might want to check out our introduction to lab grown and synthetic diamonds before continuing with … like Cubic Zirconia (CZ) or Moissanite, it is easy to identify them because they aren’t diamonds. But, with lab grown diamonds, the chemical structure and properties are all the same as natural diamond, so it becomes much more difficult…
-
Fake Diamonds: The Great Diamond Attack
… a likes. Modern science has developed a man made gem that can fake out the standard diamond tester. Moissanite is lab-created, silicon carbide, and it gives a positive reading on a diamond tester. But science fights back with a … also has some gemological properties (it is a DR stone while diamond is a SR stone) that help identify it, but labs are working to change the nature of the stone. It has a Mohs hardness of 9.25, excellent toughness, refractive index of …
-
The History of Diamond Cuts
… many variations. A 3 facet rose cut looks a lot different than a 24 facet rose cut. Some cuts can vary by multiple facets and still be considered properly cut. With other cuts even changing 1 facet would result in the diamond being labeled a miss-cut (often causing it to be sold at a discounted price). It just depends on the type of cut and where the deviation from the “standard” facet pattern is. The next important diamond cut is the French cut. The French cut is a …
-
The Difference Between White Gold and Platinum
…white, and does not need to be rhodium plated. This new alloy is called Star White Gold . It is still not widely available, so these paragraphs still apply to most jewelry, but Star White is different. Learn more… White gold is an … at higher temperatures. These and other reason make platinum more expensive to work with than white gold. So, the labor cost of platinum jewelry is more also. Want to see some real-life jewelry in these different metals? You can always …
-
Frequently Asked Question about Jewelry
… advancements in the field. The pace of change in the gem industry is staggering. What is Moissanite? Moissanite is lab-created silicon carbide. It has become an excellent diamond imitation since it gives a positive reading on a thermal … between a Diamond Certificate and an Appraisal? A Diamond Certificate is a document issued by a Gemological Laboratory describing a Loose Diamond. The laboratory will not issue certificates on Diamonds which are set in a mounting. A …
-
Understanding the Diamond Buying Game
… this is not always the case. Today, to make the grading standard more uniform, diamond certification by grading laboratories is thought to make diamonds a commodity. Again the dream is not the reality. The nature of diamonds is that … diamond is unique. Diamond reports don’t tell the whole story. First, it is well known that not all diamond grading labs grade with the same standard. GIA and AGS use the most technical standards. EGL uses a looser grading standard, I …
