Custom cut gems, Custom cutting of gemstones, How To facet gemstone, In side Koala-t cut gems, Offering of gem rough material, Pirvacy policy, Rough gemstone for sale

Blog Koala T Cut Gems

tourmaline gemstone faceted round light green koala-t cut gems

One Of My Favas Big green tourmaline cut by me.

All the best

Chris B

How To facet gemstone, In side Koala-t cut gems

New Ultra Tec Faceting machine rep

New Ultra Tec Faceting machine rep
New Ultra Tec Faceting machine rep
Up Date 10/01/20012
New Ultra Tec Faceting machine rep
Introducing…. New Representative…

Chris Byron
We Welcome Chris Byron

… Tucson, Arizona

In Tucson, Arizona – Ultra Tec’s new representative is Chris Byron (Koala-t cut gems). Having experimented with various faceting machines, 20 years ago, Chris determined that Ultra Tec was the one.

Shortly after that, he met Jeff Graham – the hit it off, and Chris worked with Jeff for years, virtually on an apprentice basis – literally, polishing his skills.

As a professional cutter over those years, Chris feels that he has confirmed and reconfirmed the precision and value of his Ultra Tec machine. Chris is an aspiring competition cutter, participating in the AGTA competition – he hasn’t won – yet. Chris says that he is looking forward to guiding new and old cutters in their machine selection – basing his recommendations on his own extensive experience.


•V5 Product Page
•ULTRA TEC Website
•Koala-T Gems – by Chris Byron
•Rioux Rocks – Facebook Page by Joshua Rioux
•Precision Gem Website
•Ashton Gems Website
•Dalan Hargrave’s Gemstarz Website
•John Dyer Gems Website
•Beckham’s Barn Gemshop
•Lisa Elser’s Website
•Faceting Academy Website
•Gary Kratochvil’s Website
•Ambrae Website
•Lew Wackler’s Website
•Best Cut Gems Website
•John Dyer’s DAD Review
•Concave Faceting Machine Page
•Middle Earth Lapidary
•Fantasy Machine Web Page
•Zava Gems Website
•Darlan Hargrave Article on Concave Faceting
•Dalan Hargrave’s Concave Facet Book Synopsis
•Museum Diamonds Website

Once again, thank you as always for your interest in ULTRA TEC and our products. We’ll be in touch again soon with the next Sometimes Bulletin.

Bye for now!

The Ultra Tec Team

How To facet gemstone

New Faceting machines

Koala-t cut gems is proudly offering new Ultra Tec Faceting machines for sale. Chris Byron Of Koala-t cut gems is now the new representative offering sales in Tucson Az. Please Make an appointment to see what we have to offer you.

Thank you

Chris Byron

Ultra Tec Lapidary Product Line

Classic Faceting Equipment

Ultra Tec V5 Classic Faceting Machine

Ultra Tec V2 Classic Faceting Machine

Concave & Fantasy Faceting Equipment

Ultra Tec Concave Faceting Machine

Ultra Tec Fantasy Machine


Faceting Accessories

Concave & Fantasy Accessories

How To facet gemstone

About Faceting a Gemstone

Beginning Faceting

This manual is meant to be a general guide to beginning faceting, Remember that the information in this manual is general and that there are a lot of ways (techniques) to get the same job done, In this manual I will outline the cutting methods that I use and the ones that work best for me. theadvice that I can giveyou – is to learn the basic infromation in this manual.As you get some cutting experience, you will gradually find what works best for you. Don’t be afraid to do some experimenting and try other techniques. What you find works best for you will depend on many things – your personality, machine you use, the type of stones you cut, and so on.  As you learn how to cut, you willalso find that some stones, even though they are the same type, cut differently from eash other, so what you did last time may not work. Experimentation is a good way to help solve problems you may run across.
Stone Design Basics:
There are a few terms for describing a faceted stone or a faceting design, These terms are genral and, depeneding on where you are, they might have slightly different meanings. Also, depending on how complicated  the design is, the terms may not apply to all of the design. At the right is a design

for a standered round brilliant note the names of the facets and like a wedding cake  at the tiers (layers of facets like a wedding cake at the same angle around the stone) meet each other (point to point) to form the top (crown) and bottom (pavilion) of the stone, joined by the girdle (vertical). Notice the dimensions in the side view. Most stones should be divided into roughly thirds, 35% of the total depth of the stone should be the crown with the pavilion about 60% of the stone. The table should around 50% of the total width of the stone. These figures are averages and, depending on the design, they could be quite different.   The facet names apply generally to almost all shapes (square, oval, rectabgle,) of stones, as long as they are in the same position. Meetpoints are points where two or more facets meet. most of the time in cutting a stone involves mahing facets meet, getting them to line up. On some stones (commercially cut in particular) the girdle facets are not cut. its just rounded, this saves a lot cutting time. You will also notice  that the facets usually don’t meet. I cut girdles, I think it adds to the stone finished look.
A Few Other Common Types:
A few types of cuts (facets) are very common as you can see the names are usually descriptive of the cut. I listed these basic types because you may hear them talked about, but there are hundreds of other designs (although the types of facets are pretty much the same) and I don’t have time to go into them in this text. I recommend that you do some reading to familiarize yourself with them.
Some Definitions:

“c” axis  It is easier than it sounds, the “c” axis runs perpendicular 90 to the crystal growth. it is generally the direction in the crystal that has the best color. You often must know where the “c” axis is to orient for cutting. If any (quartz has none).


A flat plane along which some crystals can be split. Basically it is a weak spot (direction) in the crystal growth. A crytal with perfect cleavage is weak and breaks (cleaves) easly with slight pressure (Topaz). These types of crystal must be oeiented so that cutting forces(and facets) are not placed on a clavage planes. Some crystals have imperfect cleavage in several directions (sapolite). So it’s important that youy know the type of materil you are cutting and it’s cleavage, if any (quartz has none)

Critical angle (C.A.)

In faceting the critical angle is the angle below which light entering a material (stone)   is no longer reflected back up through the crown of the stone. Foe example, the critical angle for quartz is about 40.5 if the pavilion of the stone is cut below this angle the light will go straight through the bottom of the stone instead of reflecting up through the crown like it should. When this happen the stone loses brilliance and sparkle, causing the stone to look dead. The refractive index (R.I.) of a material is what determines the critical angle. The higher the R.I. of the material  the lower the critical angle. for examply, the R.I. of Quartz is 1.54 the critical angle is 40.49, the R.I. of Diamound is 2.41 and the critial angle is 24.62. The higher the R.I. of a material, the more light reflection and brilliance it has (the light tends to bounce around traped inside of the stone causind dispersion). look at a Diamound next to a piece of Amethyst sometime and see the ( big ) difference.

History of Facetted Gemstones

Facetted Gemstones made their appearance in European jewelry during the late 13th and early 14th centuries. With the advent of the horizontally turning cutting-wheel in the late 1400s came the possibility of designing and repeating elaborately conceived geometric faceting schemes, thereby controlling and enhancing the light coming from within the stone.

Starting with the burgeoning Renaissance gem-cutting trade in Bruges, to Venice, Florence and eventually the whole of Europe, the management of light became the central theme in gem cutting. During the same period, Flemish painters, such as Jan Van Eyck (c. 1390-1441) also took up the obsession with light and reflection in their artwork. Using the laws of optics as a guiding force, the exterior shape and facet scheme of a cut gemstone would now be preordained by the refractive and reflective properties of the mineral itself.