Archive for the ‘Gemstones’ Category
Wednesday, October 21st, 2009
A jeweler in Cabo San Lucas sold this Mexican matrix opal pendant to my client. He was very proud of the “Madonna” within the precious opal center. The white rhyolite matrix even has a “halo” or “glory” hovering over the figure! I was very interested in the inclusions, never having seen “fish scales” in opal […]
Tags: fingerprint inclusions, fish scale inclusions, John Koivula, Madonna, matrix opal, Mexican Opal
Posted in Gemstones | Comments Off on Madonna in Opal
Saturday, October 10th, 2009
We recently had the privilege to work with this wonderful group of gem opals in the 7 to 10 carat category. The top row are opals from Mexico, including the orange red Fire Opal, and the others from Australia’s famous Lightning Ridge and Coober Pedy fields. The term Fire Opal refers specifically to those Mexican […]
Tags: Coober Pedy, fire opal, harlequin, Jalisco, Lightning Ridge, Llovisnando, Lluvisnando, Magdalena, Queretaro
Posted in Custom Jewelry, Gemstones, Jewelry Facts | Comments Off on Fine Opals from Mexico and Australia- a Photo Gallery
Friday, October 2nd, 2009
Blue, the color of sky, ocean, peace and tranquility has long been associated with purity and wisdom. Blue colors dominate many forms of spiritual art. Cardinals of the Catholic Church, exemplars of chastity and celestial purity, often wore rings of blue sapphire. Blue has always been an important color for mankind, so when we ask […]
Tags: beryllium diffusion, Burma, Ceylon, gem enhancements, Geuda, glass filling, heat treatment, Kashmir, Madagascar, surface diffusion
Posted in Gemstones, Jewelry Facts | Comments Off on What is the Best Color for Blue Sapphire? Part 4
Saturday, September 19th, 2009
This interesting and highly collectible “Prince Albert” style watch chain and fob is now on display in our Estate department. Though we have no direct provenance, because of the appearance and quality of the gem inlays and fob plus the fine craftsmanship, we’re pretty sure the piece is of California gold-in-quartz set in karat gold, […]
Tags: gold-in-quartz, San Francisco, Sierra Nevada
Posted in Estate Jewelry, Gemstones, Jewelry Facts | Comments Off on Vintage California Gold-in-Quartz Watch Chain
Wednesday, September 16th, 2009
We published this article February 2009 with good response. Since Sapphire is the stone for September, we thought it appropriate to republish, with minor additions, editing, new pricing information and larger pictures. Early in my career as a gemologist, while working the gem identification counter at the GIA Gem Trade Laboratory in Santa Monica, I […]
Tags: beryllium diffusion, Ceylon, Chatham, GRS, Madagascar, Padparadscha, Robert Crowningshield, Sri Lanka, Tunduru
Posted in Custom Jewelry, Gemstone of the Month, Gemstones | Comments Off on What is the True Padparadscha? Again!
Thursday, September 10th, 2009
Blue sapphires are found in many countries worldwide. The geological conditions in which they form determine the quality of the sapphire crystals. Some locales are known to produce exceptionally fine crystals, yielding extra fine gems. Each locale produces a range of gem material that shares common characteristics that are directly related to its unique geology. […]
Tags: alluvial mining, Burma, Ceylon, county of origin, gem gravel, GIA, GRS, heat treatment, Kashmir, Madagascar, Mogok, Sri Lanka
Posted in Gemstone of the Month, Gemstones | 1 Comment »
Saturday, September 5th, 2009
The characteristics of any gemstone are directly related to the crystal from which it is cut, so it’s important to understand how the physical nature of the crystal influences the color of the gem. In the case of blue sapphire, one of the more common crystal forms is an elongated six sided dipyramidal form, as […]
Tags: color zoning, heat treatment, hexagonal crystal system, pleochroism, silk
Posted in Gemstone of the Month, Gemstones, Jewelry Facts | Comments Off on What is the Best Color for Blue Sapphire? Part 2
Thursday, September 3rd, 2009
Our clients often ask “What is the best color blue sapphire?” There are two answers– the obvious is that personal preference should dictate your color choice. Every person has unique abilities to perceive color, based on such things as age, health, culture and genetic gifts. Some people prefer light pastel colors, others prefer rich intense […]
Tags: Australia, blue sapphire, Burma, Ceylon, heat treatment, hue, Kashmir, Madagascar, Montana, saturation, Thailand, tone
Posted in Gemstone of the Month, Gemstones | 3 Comments »
Saturday, August 29th, 2009
A couple of years ago, a local attorney’s wife was in our store, browsing some colored stone jewelry in the estate case. I asked if she had any favorite gemstones– “none in particular”– so I asked about her birthstone. She replied “Oh, I don’t like my birthstone, it’s peridot.”
Posted in Custom Jewelry, Gemstone of the Month, Gemstones, Jewelry Facts | Comments Off on Peridot- the “I don’t like my birthstone” Birthstone, Part 3
Saturday, August 29th, 2009
Last August, our client, Meryl, was in our store getting a ring sized when she mentioned that she had never liked her birthstone, the peridot. A challenge like that is hard for a jeweler and gemstone lover to refuse, so I showed her this grand 5.o6 ct. peridot from Burma. She was delighted and entranced […]
Tags: Burma, CAD, Custom Jewelry, jewelry designers, JewelSmith, peridot
Posted in Custom Jewelry, Gemstone of the Month, Gemstones | Comments Off on Peridot- the “I don’t like my birthstone” Birthstone, Part 2