High Marks
So, you've always dreamed of owning an authentic Lalique plique jour enameled dragonfly brooch with opal hind wings and eyes of demantoid garnets. In this desire you are not alone. It is classic jewelry at…
News ArchiveWebbed Opal
An opal and diamond ring was submitted for a damage report pursuant to an insurance claim. The opal cabochon measured approximately 16.5 x 10.8 x 4.7mm. Standard gemological testing confirmed the identity of the opal…
Gem NotesA Classic (Synthetic) Example
A ladys platinum ring containing a blue center gemstone surrounded by old European cut diamonds was submitted by a jeweler for identification of the center stone. Standard gemological testing confirmed the stone was doubly refractive…
Gem NotesTechnology Update – Magnetism in Gem Testing
One recent technological development is that of rare earth magnets, which have incredible strength and stability, even in small sizes. While commonly nickel plated, these magnets are made of neodymium, iron, and boron (NdFeB) and…
Featured ArticlesColored Stone Market
The colored stone market remains volatile. Gemstone prices continue to increase as the U.S. dollar continues it slide against other major world cur- rencies. This is frustrating dealers who are seeing their costs climb at…
Colored Stone MarketDiamonds in Brief
At the Tucson gem show in February, I spoke of the sad chapters of bankruptcies that now plague the diamond industry. Back then we knew of filings from the previous year that included Fabrikant, Fortunoff…
Diamond MarketGemstones and Light: The Science
Gemstones can look dramatically different when viewed in different lighting conditions. The perceived color can make a huge difference when grading and pricing these gems. Understanding what light sources to use first requires a knowledge…
Featured ArticlesMarket Trends: White Sapphire
Like most sapphire varieties, white sapphire has experienced increased demand and higher prices during the past few years. Dealers in Sri Lanka report that material is being heated to produce the colorless material now that…
Market TrendsDiamonds in Brief
Soft holiday sales will not influence suppliers and diamond prices are expected to continue to rise. Store closings and bankruptcies are rising. Greater return memo hurting the industry. More sightholders…
Diamond MarketUnusual Zoned Paraiba
This gemstone came to us for observation and an opinion of value. The loose gem did prove to be Paraiba tourmaline…
Gem Notes