Search Results
Fine Jewelry University Articles matching: “Gold vinegar test”
Showing only FJU Article results. Click here to show all results.
Fine Jewelry University (Show All FJU Articles)
-
Gem in the Spotlight: Amethyst
…. About 50% of amethysts on the world market are now believed to be synthetic. This is a fairly recent discovery as many low cost, high quality, deeply colored amethysts are now appearing in inexpensive jewelry. Because the cost of testing is higher than the cost of even the natural stones it is not often performed. Beware of stones of perfect clarity, calibrated sizes, and precision cutting. Notable Stones One of the most famous amethyst stones is in The Morris …
-
Gem in the Spotlight: Tsavorite Garnet
The discovery of Tsavorite in East Africa in the 1960s changed the jewelry world. Here was a gem with the color to rival the most exquisite emeralds and the clarity of the cleanest sapphires, all with the time tested durability of garnet. Tsavorite is a unique form of garnet with a stunningly vivid green color. It is bright and lively with a high refractive index giving it excellent sparkle and scintillation. Tsavorite is also a very rare …
-
Fake Diamonds: The Great Diamond Attack
A popular game show would have three people all say that they were someone and the contestant would try to find out who was the real person. Technology has created many new diamonds and diamond lookalikes. “… a likes, (CZ, GGG, YAG, Synthetic corundum and spinal, Glass) or simulants are quite easy to separate. The diamond tester and understanding gem properties make choosing the diamond an easy task with these older lookalikes. Apathy and …older lookalikes get by, but generally the profession is dealing with these well known simulants easily. The diamond tester (thermal inertia testers) is the front line in finding diamond fakes or look a likes. Modern science has developed…
-
What Are Lab Grown Diamonds?
… are especially good at transferring heat, and so is Moissanite. This is important because the most popular diamond testers use heat dispersion to test if a gemstone is a diamond. However, Moissanite has a completely different chemical … properties. For example, Moissanite is double-refractive whereas diamond is single-refractive. Since Moissanite tests like diamond (due to its heat dispersal properties), people think it is diamond or synthetic diamond. However, since it…
-
Jewelry Solder: What You Should Know
… we first have to understand metal alloys. If you haven’t already, now would be a great time to read our article on gold purity . Now you should know that the metals that make up our jewelry are actually a mix of multiple different metals… gold jewelry, but the same concepts also apply to silver and platinum as well. If your ring is made out of 14 karat gold, you know that approximately 56% of it is gold with the rest being made up by a variety of different metals like …
-
Gem in the Spotlight: Peridot
…gem of the sun”. It was believed that peridot could chase away evil spirits and dissolve curses but only when set in gold. Peridot is the birthstone for August. It is also the accepted anniversary gemstone for the 16th year of marriage. … Peridot could chase away evil spirits and break curses. Some legends added that this can only happen when it set in gold. Peridots were favored by pirates, considered powerful amulets against all evil, and when set in gold, were said to …
-
Types of Necklace Chains
… use of metal. So, you can have a big chain look without a big chain price. This is a very nice feature to have when gold prices are high. The only downside is that this style isn’t quite as strong as a traditional cable chain of the same… types of slide pendants work well with omega chains. PROS Style – Like the herringbone, omega chains show a lot of gold and create a big, impressive look. Strength – Among flat style chains, omegas are one of the strongest designs. CONS …
-
Caring for and Cleaning Your Jewelry
… use chlorine or products that contains it. Don’t use a hard toothbrush because they tend to scratch the metals (gold, platinum, etc.). Abrasive cleaners and toothpaste or toothpowder will also scratch the metals. This will take away the … all gems. In fact diamonds have been through a lot of stress before they reach you. The mining process and cutting tests the stone long before it reaches you. With conscious care, the diamond can last for generations just as beautiful as…
-
Platinum
… of discerning individuals. Platinum is one of the strongest and most enduring metals. Some of the world’s greatest treasures are set in platinum, such as the Hope Diamond. It is also one of the heaviest, weighing 60% more than gold. The …named it contemptuously platina (little silver) and threw it back into the river to ripen into silver. In 1912 white gold was “invented” in Pforzheim, Germany, as a substitute for platinum. These properties piqued the interest of a …
