by Bob Keller I attended the Faceters Symposium 2000 held on Friday-Sunday August 4,5 and 6 in Riverside, California, hosted by the Faceter's Guild of Southern California. The Symposium was held in conjunction with the California Federation of Mineralogical Societies "Gold and Gem Show", which was hosted this year by the Valley Prospectors. A special recognition and thanks to Glenn Klein as the Faceters Symposium 2000 spark plug and chairman is especially deserved and warranted. I rode over from Tucson with Rob Kulakofsky, a fellow Tucson Old Pueblo Lapidary Club Member and co-instructor of an OPLC introductory faceting class. Other Tucson faceters attending the Symposium were Art Kavan and Dieter Irmischer, both of whom are well known in competition faceting circles. Our Thursday drive from Tucson, AZ to Riverside, CA traversed a section of the Great Basin and Range Province of the American Southwest, and we saw some very interesting volcanics and exposures of igneous and metamorphic rocks en route. Rob is a 'retired' technical climber and some of the granite exposures and eroded plutons along the way had him drooling. It's a good thing there was no climbing gear in the car as had there been, I don't think we would have made it to Riverside... There was also an extensive dry lake along our route and numerous mining operations. I'm going to have to get back along this way sometime to do some exploratory back packing and rockhounding in several areas with contact metamorphics that were particularly appealing to my eye. However, this geological/ecological province is brutally hot and dry and when I do return it will be during cool weather. Maybe during Quartzsite 2001... ![]()
Rob and I wolfed down the breakfast bar at the Holiday Inn next door and made it to the Riverside Convention Center just in time to pay our $70 registration fees and collect our registration packets prior to the beginning of the Symposium Friday morning. Our registration packets contained a very nice collection of 45 gemstone designs by Charles Covill, Robert Strickland, Carl Unruh, Jerry Carroll, Paul Smith, Don Cassler, Paul Rivard, Gordon Richardson, Jerry Kline, Clare Gagnon, Cee Jay, and Bob Haines. Included in a Symposium schedule were articles "How to Go from Novice to World Class Facetor" by Glenn Klein (above right) and "Dopping - One More Time" by Clare Gagnon. Also included in our packets were a copy of the jewelry manufacturing trade magazine "AJM" and even a "sampler bag" of rough. Mine included a synthetic and natural quartz, garnet, topaz, peridot, a pink CZ and several sunstones.
Glenn Klein welcomed everyone and got the Symposium underway with the introduction of the first seminar speaker, Lothar Vallot, at right. Lothar is an experienced gemstone and jewelry dealer as well as a gemology instructor for Santiago Canyon College, a community college in the Rancho Santiago Community College District in Orange, CA. The first portion of Lothar's presentation involved the value of gemstones and the realities of the marketplace. He reminded everyone about how easy it is to buy things and how hard it is to sell them, a phenomena well known and appreciated by many "in the trade".
I appreciated Lothar's realistic outlook and plain talk regarding what it takes to keep food on the table and a roof over your head selling gemstones. Lothar also described the gemology program at Santiago Canyon College, of which he was obviously proud and which he reported enrolls 50+ students and graduates about 25 annually.
Here's some of Charles' designs which were included in the design booklet distributed in our registration packets:
Charles also handed out floppy disks with over 80 of his designs with odd numbered mains in GemCad format (.gem files). GemCad users can download Charles' "Odd Mains" collection as a zip compressed file:
Charles shared the following joke during his presentation:
Thanks Charles! We broke for lunch after Charles' presentation and I wandered down to the registration and information area for the California Federation of Mineralogical Societies Gold and Gem Show which was going on concurrently with the Faceters Symposium 2000 in the Riverside Convention Center. This nearby lunch spread provided by members of the El Cajon Valley Gem and Mineral Society caught my eye immediately:
As appetizing as it looks, I decided to hold off eating any of this, as it was a surefire invitation for indigestion. You have to look pretty closely to appreciate that the center piece and all the food set on this table were a rock feast! Actually, I didn't eat any lunch on Friday, as I went back to our motel to duplicate some odd mains floppies for Charles Covill, who had run out after his presentation. On the way back I ran into AFMS Faceters List member Teresa Masters in the Convention Center lobby, who took me into the Gold and Gem Show exhibit area and introduced me to Doug Turet, another Faceters List member. Doug had brought a significant amount of his faceted stones and carvings to the show and I blew the rest of my lunch hour checking out his work.
Glenn recommends 44 degrees as the optimum pavilion mains angle and 38 degrees as the optimum crown mains angle for normal sized quartz stones cut from clear or lightly saturated material. Not 43 degrees as he has previously published, 44 degrees. The discrepancy was due to discovering that the faceting machine he designed and used was off its indicated 43 degrees by a degree, with the result that the stones he thought he was cutting at 43 degrees were actually cut at 44 degrees.
While Glenn confined his presentation to angles for quartz to help keep it from becoming confusing and getting out of hand, he distributed a written list with his recommended pavilion angles for some other materials:
The final presentation of the day was given by Ed Romack, a competitive faceting judge whose experience includes judging many competitions including 4 Australian Challenges. Ed explained many of the differences between our competition rules here in the US and those in Australia. The Australians host the faceting world championships and the different approaches they take to evaluating and judging competition stones has been a source of difficulty for many competing American faceters.
Ed had many tips and advice for faceters entering both US competitions and the Australian world championships. Ed provided what sounded to me like some pretty sage advice from one who knows how competition judging works, so as a competitive faceter wannabe I was all ears for what Ed had to say. I figure who knows better what it takes to win than the judge...?
Above left, the 7,597 carat Lucky Stone CZ. Above right, the 3,444 carat Duchess Quartz.
Above left, the 12,678 carat Countess CZ. Above right, the 5,280 carat Milestone Citrine Quartz.
At left is a view of part of the dealer and vendor area at the California Federation of Gem and Mineral Societies Gold and Gem Show. After Symposium hours, Rob purchased several pieces of faceting rough including a 40 gram chunk of ametrine for an upcoming OMF faceting project, and an absolutely killer *chunk* of opal for which he paid only $35! Depicted below are two lesser pieces from another dealer's opal bin wanting about the same money that Rob considered momentarily, but cast off as leaverites before finding *the one* he took back home to Tucson.
While I was sworn not to buy any more rough or specimens while over in Riverside during the Symposium, I did find a pinkish slab composed of an interesting crinoid hash...
See what I mean? Even though I have enough rough in my slab box(es) to cab and lapidary for the rest of my life (and then some) without running out of nice material, how could any self respecting rockhound pass up a nice slab of this gorgeous stuff for only eleven bucks! So of course this one went home with me. I rationalized that I'd do without dinner for a penance, but I didn't do too well at that either as I wound up going out later that evening to a steak house with Rob and Doug Turet for a porterhouse...
Hubert passed around several of the references he used to derive and document the cuts, the principle one being "Famous Diamonds" by Ian Balfor, published by the Gemological Institute of America, ISBN 0-87311-027-2. If you're interested in "Famous Diamonds" you can order this $125 book from the GIA Online Bookstore, alphabetically listed in the General Gemology section. During his informative presentation Hubert discussed some of the techniques he employs to cut his CZ masterpieces. He uses machine a mounted diamond saw blade to preform the rough, and an oscillating device with his Ultra Tec to cut hands off so he can work on other projects for 10 minutes at a stretch or so. Hubert reported that he dops the crown side of his stones with 3M CA4 Pronto Adhesive, a cyanoacrylate, and EpoxyBond 5-minute epoxy (allowed to cure overnight before working) on the pavilion side. Once cut, he employs 3000 and then 14,000 grit diamond to prepolish the CZ. He estimated about 40 percent of the time required to cut one of his great diamond replicas is consumed by cutting and prepolish, and about 60 percent of the time devoted to polishing. He offered some sage advice which most faceters will recognize to be the voice of experience - "When you get a good polish, STOP!" Hubert related that Texas Faceters Guild members were working on a collection of Great Diamond patterns which he expected to be ready for distribution this October, and I'm looking forward to acquiring them for my gemstone design library. Pictured below are 10 of Hubert's replicas. No one walked by his case in the exhibition area without stopping to admire his work! However, I think it took a fellow faceter to really appreciate what they were seeing and the significant investment of time and labor of love that Hubert's replicas represent. The weights given are for the diamonds, Hubert's replicas are heavier since they are faceted from CZ which has a significantly greater specific gravity (5.6 - 6.0 for CZ vs 3.5 for diamond).
John's presentation was of course on the topic of gemstone inclusions, and what to do with them, which boiled down to about six different approaches:
However, this wire wrapped ring at right featuring a rutilated quartz serves to provide a nice illustration of the approach where the included material is cut as a regular faceted stone. This piece was on display in a case in the exhibition area at the show. It was created by Dee Clason of the Kern County Mineral Society. BTW, if you're interested in the "Photoatlas of Inclusions in Gemstones" you can also order this book from the GIA Online Bookstore, alphabetically listed in the General Gemology section.
B.C. gave up several points on showmanship and labeling on his case score, but his display had the educational and interest factor to win. This machine has a lot of cute appeal and I wouldn't mind owning and playing with one of these some day. I like to think of spheres as faceted stones with infinitely many meet points. ;)
![]() Above left, B.C.'s case showed several miniature spheres at various stages in the progression from a sawn block of rough to the polished sphere, along with corresponding cups and grits/polish used during each stage of the progression. Above right is a display of the various types of cups used for rough and fine grinding and polishing operations.
Above, left to right are agate, turquoise and amethyst spheres juxtapositioned in front of pieces of corresponding rough. I have come to appreciate that exhibits like this are very interesting and informative to the public, and I think this one deserved its win. Good job with your case B.C.!
Above are just two of many interesting stones displayed in cases in the exhibition area that I enjoyed browsing between the Saturday morning and afternoon Symposium sessions. At left is a 263 carat fluorite triangle which was faceted by Jerry Newman of the Faceters Guild of Southern California. This stone was approximately 2 inches across and I think Jerry picked a design that was well matched to the material. At right is an 87 carat, 115 facet modified brilliant smoky quartz cut by faceter Sandy Taylor. I've always thought the stone with a natural crystal approach to display very attractive and I think that method is also educational for the public at large. It also gives the hard core mineral collectors something they can relate to. ;)
Benitoite is the official state gemstone of California, and gem quality benitoite crystals of any size are rather rare and expensive, making this pendant a rather special piece. The central, cut corner rectangle appeared to me to be at least 2 carats in size, which makes it somewhat of a whopper as nice faceted benitoites go. Displayed in the exhibition area by the California Federation of Mineralogical Societies.
Somehow I got my wires crossed on when we were supposed to reconvene for a luncheon and awards ceremony for the winners of a single stone competition held in conjunction with the Faceters Symposium. So when I dutifully showed up at 1:30, lunch and the awards ceremony was already over, and Robert Strickland was well underway with his seminar presentation on GemCad.
I later learned that Dan Nagy won the Novice competition, and one of our Tucson faceters, Art Kavan, prevailed in the Masters competition. There was no winner in the Advanced competition, as no Advanced competition entries were awarded the minimum qualifying score for a win. Congratulations to both Dan and Art on their wins in the Faceters Symposium 2000 competition!
GemCad is CAD software for designing gemstones which has become very popular and almost universally adopted by gemstone designers over the last decade. Robert Strickland is GemCad's designer and programmer and his seminar presentation covered GemCad of course. For the benefit of those at the Symposium who were unfamiliar with GemCad or had questions regarding its use, Robert devoted the first part of his presentation to the current GemCad software. I am a GemCad user myself and even though I've been using it for several years, it seems to me that GemCad is the kind of program and application where you get more proficient over time but just don't ever seem to master. Thanks to Robert's question and answer session, I finally found out what it was I just hadn't been able to grok on my own regarding using GemCad's "Bisect" command. Nothing like having the software's designer on hand to explain it to you! GemCad does what it does very well, but it is a DOS application developed before the Microsoft's Windows OS became popular and widely adopted by PC users. The learning curve for GemCad is pretty steep and its "GUI" is antiquated and clunky by current standards. It's the sort of software that's lacking in appeal to those users who didn't cut their teeth on autoexec.bat files and DOS printer drivers. However, GemCad is what there is if you want CAD for gemstone design and the raytracing tools provided by Robert as part of the GemCad suite. GemCad provides functionality even for faceters who are not into gemstone design per se. It is a very useful tool for checking published "pre-computer" designs for errors and typos, changing the angles of a design using the tangent ratio method to adapt it to materials with varying refractive indexes, and providing a reality check on light return with its raytracing capabilities. However, the GemCad learning curve has been an obstacle to many potential users who could benefit from these functions.
Rumors that Robert's had a Windows version of GemCad under development have be circulating for some time, and after he covered the DOS software he demonstrated an alpha version of GemCad for Windows. Shown above are two screens shots from the Windows alpha. It looked pretty slick and when queried as to when, Robert responded that the first release version *might* be available by Christmas 2000. Robert related that his first release of GemCad for Windows will incorporate a single shot raytracer, but not the equivalent of the companion GemRay raytracer that is available as part of the DOS GemCad suite. However, Robert said that the .gem files output by the Windows version would be backwards compatible with DOS GemRay. So current users who wish to do so will be able to migrate over to the Windows version for the CAD work and still check out the optical performance and generate brightness plots with their DOS GemRay software in the interim until Robert gets GemRay functionality ported to the Windows software. To provide an idea of the power of the GemCad design suite, shown below is a brightness plot using three different lighting models output by DOS GemRay of a Bar Oval design I'm currently developing.
An Uncrippled Demo Version of DOS GemCad is available as a free download for those who are interested in checking it out. GemCad WinPrint is a freeware utility for interfacing DOS GemCad to Windows printers that Robert released a year or so ago, and it relieves the pain and frustrations experienced by a number of users who were running GemCad as a "DOS" window under Windows and had headaches getting their Windows printers interfaced with it. Robert also related that he planned to incorporate a port to a VRML (Virtual Reality Modeling Language) compatible file format in Windows GemCad, which has some very interesting ramifications for potential web site applications! :) I asked Robert if he had set a price point for GemCad for Windows and he responded he had not determined that yet.
BTW, if you know of a larger faceted CZ, Carl would like to hear from you regarding it. So far, no one has stepped up to challenge The Countess as the rightful heir to the title of world's largest. I also have no doubt that if someone has cut a larger CZ, the Dare Devils will no doubt soon be tooling up to top it. Of course stones of this size are faceted using custom made equipment. The Countess was cut on equipment spinning specially prepared 14 inch diameter copper laps charged with diamond bort and powder. The 14 inch laps used by the Dare Devils have about 3 times the surface area of the conventional 8 inch laps used by most faceters, and about 5.5 times the surface area of the 6 inch laps used on some faceting machines. Carl is a CZ expert and an enthusiastic proponent of CZ as a faceting material, so it was only natural that he discussed techniques and tips for faceting and polishing CZ during his seminar presentation. Here's a quick summary:
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