If you can't find an answer here, email me: I'll do my best to provide an answer.
Q.
If lapidary is as easy as you indicate on this site, everyone would be cutting gems, wouldn't they?
If everyone knew just how easy it is, yes, there'd be a lot more people
enjoying it. . What stops people is the high cost of equipment (at least $2,000 for a
commercial faceting or cabbing machine) and the high cost of gem rough (high quality synthetics
represent a fine alternative to natural materials).
Q. I can understand the cutting aspect, but where do
you obtain all the gem rough to cut?
A. That's the easiest part of all. There are dealers all over the world
who'll be glad to sell you rough and you can reach them on the Internet especially at
Ebay or just Google for "cabochon rough".
Q. What's a good cleaner for gemstones that's safe and efficient? Is
ammonia really necessary?
A. Nix on the ammonia: it stinks heartily and that's about it. Use ordinary eyeglass cleaner,
or you can toss the gemstone into a shot of vodka (seriously!). Vodka is vegetable based
alcohol so it'll do a great jog cleansing a crystalline surface while evaporating without stains.
You can then drink the vodka - and maybe your eye sight will no doubt detect a fantastic gem
improvement.
Q. Gemcutting sounds like something where you'd be better
served by enlisting the help of an experienced teacher. I live too far away from
such a resource.
A. Most gemcutters don't have quick, easy access to instructors
either - which is why the bulk of American gemcutters are self-taught. I keep
insisting that it's that easy, and information is easy to come by. There's the lcal guilds plus
an active lapidary newsletter community, federations, local clubs, private instructors.
Furthermore, many guys and gals simply lash up with colleagues on a share-the-info basis.
Q. I attach gemstone rough to a metal dopstick with
cyanoacrylates (Superglue) and epoxy, but it's a devil to break down the matured
attachment when I want to remove the stone. Isn't there an easy way?
A. There certainly is a simple, safe way - and it's not the old fashioned method of
soaking in such dangerous solvents as Acetone, Ketone or one of the other relatively
ugly chemicals. Use an ancient goldsmith's trick: to protect your stone, wrap it in a water
saturated folded strip of paper napkin then train a Propane torch right on the metal
dopstick you want to remove. Hold this dopstick in pliars (you can heat your fingers up
swiftly and fiercely otherwise!) and keep a steady breakoff pressure on the attachment
intersection. In a couple of seconds, the superglue and/or epoxy will surrender
completely to the heat and the still cool stone will lift away. Trust the wetted tissue:
veteran goldsmiths even use this heat sink stunt to solder around pearls.
Q. Wax dopping is such a coordinated heat and slop method with wood dopsticks. Is
there a better way?
A. Of course there is. Take advantage of wax's tendency to cold roll, long a vexing
characteristic to gem cutters. Just melt some wax, get it to wrap around the wood
dopstick and then, holding the stick vertically, push the wax glob down flat against a
cold glass, metal or plastic surface. The wax will still cling to the wood dowel but the
glob's tip will cold roll out flat against the chilly surface. Now put superglue on the flat
wax platform and attach the stone. For removal, heat a knife and cut off the wax and the
superglue - or, better yet, place the dopstick-stone assembly in the freezer for a few
minutes (and thus shrink the attachment).
Q. I'm not certain I can perform lapidary or even want to. Is there an inexpensive intro?
A. Yes. Faceting can be a terribly monotonous undertaking, particularly when you must spend
so much time attending to machine settings. Now, get ready for a commercial. I hold the patent
on the easy-to-use Calibrated Jamb Peg faceting machine. I still sell a metal assembly kit for the
CJP faceting head, but there's even a more inexpensive option. Because a jamb peg machine is
so simple to make I'm selling plans on how to make your own wooden CJP. It's great for a quick test
to see if you'll like faceting.
Don't sell this basic little faceting machine short: it'll do anything - and more - than the
$2,000 to $5,000 machines do. I jamb peg on my machine exclusively because it's quick,
easy and responsive without a lot of mechanical controls. Jamb pegs rely on your own
intuitive feeling about what should be done rather than make you fiddle with complex controls.
Q. I know nothing about faceting but I'm interested
in learning. Can you outline a good introduction on what equipment and training I'd need - and how long?
A. It really isn't all that complicated. For a quickie introduction,
link on over to my special faceting page (you'll find the link on the"Home"
page) and read the whole thing. It's commercial AND info. lso, link to
"Gemlore" on the site and read all the free info on faceting.
You'll find that you need an adquately "equipped" faceting machine, some step-by-step
instructions either with a teacher or a good manual - and a few
hours of devoted attention. I gave a biased machine option in the last
question because the CJP is very inexpensive, rapid to learn and
improves with your skills. With it, you'll need a power platform and you can
buy one for about $150 or obtain my CD on Make Your Own Hand
Powered Platform for $25 or less. You'll also need a good instructional
manual on how to facet and you could get my CD on Master Faceting
(faceting technique in general) or my CD on Make Your Own Wood CJP
which provides excellent instructions for faceting with a jamb peg. I also
have a full-length video on faceting (with emphasis on jamb pegging) although
the visuals and sound aren't all that hot because of the conversion from analog
to digial: still the information is as good as tomorrow morning.
You'll also need accessory equipment such as dopping sticks (usually
2-in long 0.25" OD brass, aluminum or steel dowels), perhaps a transfer
block (my CDs show you how to make one for pennies), some adhesive
(preferably 2-part paste epoxy, an alcohol lamp, a penlight and a 10x eye
loupe (for examing rough mostly - because it's mighty disheartening
to finish a nice faceted gem only to discover a big, fat, dark inclusion
right where you should have seen it before you started faceting!), a small
millimeter measuring gauge, laps (both abrasive and polishing), some
polishing chemicals or fine diamond grit - and some loose faceting rough.
Q. How about cabochon cutting? Do you have an
introductory for this type of lapidary, too?
A. Sure - it's essentially the same as for faceting but
with different equipment and not so many accessories. Basically,
all you need to try out your hand at cabochon cutting (and some
folks never want to go past cabbing)
- a cabbing machine (you can also build one yourself for only a
few dollars using the plans in either or both of my CD-ROM tutorials
on making cab equipment. lso check the "Gemcase" link on this site
for some inexpensive ebooks on cabochon design, cutting, etc.
- some silicon carbon cutting wheels and polishing laps, plus some
chemicals
- some dopping sticks (either 4-inch 0.25" OD brass, aluminum or
steel rods, or you can use old sucker sticks or 1/4" wood dowels cut to
your desired length
- epoxy (if using metal dopsticks) or hot dopping wax (if working with
wood dops)
- a tracing template so you can sketch the outline of a desired shape
on the fat mineral slabs
- I have CD-ROMs on Master Gemcutting that will provide you with
a fine background and theory on cabbing, and I'm working on a new,
comprehensive cabochon book on all kinds of non-faceting lapidary.
- finally, get a nice selection of various cabochon minerals (you can get
some great bargains on Ebay or Google for them. Cab rough isn't all that expensive.
Q. My interests are in gemology? What must I do
to become a gemologist and perhaps pursue a career in this field?
A. Gemology can be a wonderful field to enter, either personally or professionally. Be careful, though: there are a lot of
diplomas mills out there. The only truly worthwhile degrees in gemology is the GG, conferred
by the Gemological Institue of America (GIA) and the British gemological association's study-degree
program. All the rest, I'm sorry to say, have bad breath, and many of the so-called gemology experts
giving out degrees and expertise aren't even legitimate gemologists themselves.
Q. I'd like to take up jewelry making but I am strapped somewhat
for funds. Just how expensive and difficult is it to become a professional level jewelry maker?
A. Believe it or not, you can reach commercial level design and productive capability in a surprisingly
short time and with a lot less expense than you imagine. Wire Wrapping and even my own String Wrapping
technologies will enable you to produce professional level talent quickly and inexpensively. Of course,
personal tutoring is best, but the wrapping methods are highly cooperative with self learners.
Of course, if you pursue the goldsmith route, be prepared to spend time and money and schooling
because this area just isn't conducive to self-learning: you teach yourself bad things and techniques that a proficient
instructor will spot and halt in a second.
Q. Where is a good, reliable source of information on jewelry and the techniques related to jewelry?
A. There are two places: a) the "Gemcase" link on this website with its inexpensive ebooks, and b) Ganoksin Project - and you'll find them at http://www.ganoksin.com/. That's it! There's no better. For comprehensive, reliable and inexpensive information, these twosources reign on top of the mountain. Incidentally, you'll also find some good free info on this webiste's "GemLore" and "Videos" links. The rest are all looking up. Go to one of these sources when you want good, in-depth information.
Q. Why is gemstone polishing such an unpredictable art? Isn't there some
kind of definitive rules for gaining a good, high polish?
A. Sorry, but definitive rules for gem polishing give way to general rules. That's because no
two gemstones every present the same polishing condition. Colored gems DO have grain issues
although they're not as severe as diamond. Try polishing on the cleavage plane of a kunzite and
you'll gain a quick and heart breaking understanding of colored stone grain.
Because every stone's polishing demands differ due to changes in pH and hydrogen atom
generation circumstance, here's a general rule: polishing agents apparently require a higher
melting point than the stone due to the higher temperatues generated at the point of contact
between the stone and the polishing wheel. This condition induces a chemical or molecular
interaction between the stone and polish alike. It's this electro-chemical activity - and the
production and conduct of hydrogen atoms - that is generated by acid's ability to reduce pH levels. So General Rule #1 is: introduce acid to the polishing mix.
Reduction of pH explains why a whitish polishing agent invariably turns color - to a
dirty appearing gray - during polishing action and why a relatively soft polishing agent such as
Cerium Oxide can produce a good polish on a hard material like quartz. Cerium melts at 2600 degrees
Fahrenheit while quartz melts at 1600 degrees. It also explains why Linde A is respected as the most
effective and dependable polishing agent. Its 2050 degree Fahrenheit melting point keeps
Linde A well above most commercial gemstone materials. The higher the temperature differential
the easier it is to polish the stone. Inasmuch as the hardest glass melts at 800 degrees, you can
readily understand why even tin oxide (MP 1300 degrees) will give it a fine, quick flow polish.
Cerium oxide (also known as ceric oxide and cerium) is the most plentiful of the rare earth metals
but it can be messy to work with in powder form. On Lucite, the colloidal CeOx makes a superb polishing
agent for quartz and beryl ... especially when used as a "kicker" on a CeOx impregnated Ultralap.
The selection of an appropriate lap for polishing is not all that difficult either because, unlike cutting,
the lap surface itself has relatively little to do with the polishing action. A lap functions primarily as
a convenient and temporary carrier for the polishing agent with considerable pains taken to eliminate
or minimize any contact between the facet and the lap surface. Still the generalized rule of
-- hard laps for hard stones
-- soft laps for soft stones
appears valid most of the time.
Lap hardness does appear to have some influence particularly when using the oxide type polishes.
In the latter case it has been observed that soft stones polish more readily on softlaps and the harder laps
tend to produce superior results in hard stones. Copper, steel and zinc laps make excellent carriers for
polishing corundum (Mohs 9), chrysoberyl and cubic zirconia (Mohs 8) and Spinel (Mohs 8).
Tin/lead, Phenolic and Lucite laps come into effective use for stones of moderate hardness. The
more esoteric laps - wood, wax, vinyl, lead - are reserved mostly for soft gems. Keep in mind that lap
hardness seems most critical with oxide polishes. The advent of graded diamond powders has changed
things. Lapidary club "experts" contend that diamond can't be used effectively on very soft laps (or, as one experienced soft stone polisher
said, "wanna bet?"), but remains extremely efficient on a tin/lead lap (hardness of 2) through a rather
wide range of stone hardness conditions.
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