The Museum of Faceting Technology project began in February of 2018. At first it was devised as a personal collection but the scope quickly changed as more machines were acquired and donated. As the collection grew, it began to become a tangible representation of the worldwide culture of gemcutting.

In three years, the museum has acquired 52 machines, faceting heads, and handpieces from 21 different countries. The end goal will be to have at least one style of machine from each country that has a history of faceting. In some cases, such as the United States and Australia, there are…

Initiation. It’s February 2005. I’ve been reading the Tao Te Ching. I’m in a van driving to New England. I’ve sold everything I owned with the intention of starting a new life.

Initiation. It’s August 2015. I’ve been reading the Welsh Merlin Poems. I’m next to a cave on a sacred hill in Scotland. I’ve embarked on a holy pilgrimage in an attempt to interweave the fibers of my heart with the fibers of the Earth.

Initiation. It’s November 2008. I’ve been reading The Invisibles. My perception is outside of space-time while my body lays in a bed next to…

The Pinnacle Photo by Justin K Prim

I spent a lot of time avoiding responsibility because I didn’t want worldly pressures sitting upon my shoulders.

I sought greatness in small things and worked towards personal goals.

When the Tao Te Ching said
“The saint inspires the vitality of all lives, without holding back.
He nurtures all beings with no wish to take possession of.
He devotes all his energy but has no intention to hold on to the merit.
When success is achieved, he seeks no recognition.
Because he does not claim for the credit, hence shall not lose it.”

I listened.

As I grew older, I…

Transforming Red Cambodian Zircon with the Element of Fire

Blue Ratanakiri Zircon Photo Courtesy of Alexey Spirit Yakhlakov

Before the advent of modern science, Renaissance-era proto-scientists known as alchemists thought that they could change the fundamental chemistry of lead through an elaborate and semi-mystical process and purify it into gold. These ancient seekers were doing all sorts of experiments with chemicals and rigorously keeping track of their results in order to be able to share their findings with other alchemists. …

An In-Progress Directory

I thought this would be a very useful list.If you have additions please message me on Facebook or email.


Adamas Facet

American Lapidary Wholesalers

4100 N Powerline Rd Ste I-5 — Pompano Beach, FL 33073


915 Merchant Street, #3, Redding, CA 96002

Arrowhead Lapidary Supply

P.O. Box 247, Wellington, OH 44090

Bernie’s Lapidary Supply

1800 North Broadway, Rochester, MN 55906

Cigar Rock Box

63160 Nels Anderson Rd., Bend, Or 97701

Covington Engineering

715 West Colton Avenue, Redlands, CA 92374

Creative Gems

P.O. Box 852, Crandall, Texas 75114

Ed’s House of Gems

7712 NE Sandy Blvd, Portland, OR 97213

Facet Shoppe

PO Box 534, Burley, WA, 98322

Facetron — Jarvi Tools

780 East Debra Lane, Anaheim, California 92805…

Due to the current COVID-19 outbreak, many talks and shows around the world have been canceled so in the meantime, lets share company with live WEBINARS!

I am currently doing a weekly show with Vincent Pardieu on Wednesday’s at 8pm Bangkok time called Field Gemology Talks

If you missed any of the past webinars they are avaiable on my YouTube Channel!

Main Lecture Title

A Brief History of Colored Gemstone Faceting


Justin K Prim, author and faceting instructor in Bangkok, explores the history of colored gemstone cutting in Europe. Beginning in the 1300’s and taking us on a visual journey through history to…

Starting with the COVID pandemic I have fully embraced being a faceting tv show host and have effectively turned my YouTube channel into FacetingTV. Here are a list of shows for your faceting enjoyment and education.

The Gemcutters Craft

This series contains useful tips and tricks for new and experienced gemcutters. Click the button in the top right corner of the video below to see the full list of episodes.

Gemstone Transformations

These are short videos showing how incredible the transformation can be from rough stone to faceted gem or before and after recutting a gemstone for enhanced beauty. …

The History of Gem Cutting in the Czech Republic

19th Century Bracelet featuring Bohemian Garnets. Photo by Justin K Prim

The story of Czech gem cutting is deeply connected with the story of Bohemian garnet mining and the localities that provide them. It’s an old story, stretching back to the Renaissance, yet still living and breathing as new cutters are being trained today in the Bohemian faceting style. It’s a story that is linked to the great lapidary dynasties of Italy and the German gem cutting center of Idar-Oberstein. Let us now enter the world of the Bohemian Paradise…

Garnet has been mined in the Bohemian kingdom since the time of Celts. Jewelry with Czech garnets has been found in…

The Modern History of Gemstone Faceting in Sri Lanka

A version of this article original appeared in The Journal of Gemmology, 36(5), 2019, pp. 298–315


The art of fashioning stones in Sri Lanka (formerly Ceylon) goes back more than 2,000 years, and gems have been mined on the island for even longer⁶. Gemstones are deeply tied to Sri Lanka’s history and the island is referenced in many historical texts, from Pliny in 77 AD² to Marco Polo in ~1300¹⁰. Polo tells us, ‘You must know that rubies are found in this Island and in no other country in the world but this. They find there also sapphires and topazes…

Justin K Prim

Gemcutter / Travel Adventurer / Lapidary Historian/ Author of The Heart of Merlin /

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store