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Jolyon Ralph
Jolyon Ralph
Verified account Management group Creator of mindat.org
📍 United Kingdom Member since 10th Oct 2000 mindat.org
17714Photos
365Articles
2Galleries
81Favourited by

Jolyon Ralph's bio

Hello, and thank you for reading!

This is my personal page on Mindat, and I will update it from time to time to explain a little more about me, my background, and my interests.

As you probably know, I created Mindat.org. It began as a personal mineral database that I wrote from scratch, starting on Christmas Day 1993. The first website version of Mindat.org went live in October 2000, the year before Wikipedia launched. Since then it has grown far beyond anything I could have imagined, thanks to the huge efforts of everyone who has contributed photographs, locality information, references, corrections, discussions, and expertise over the years.

Mindat has always brought together several things that matter to me: minerals, locality data, computing, photography, history, travel, and the idea that specialist knowledge should be preserved and shared as widely as possible.

My own interest in minerals began when I was six years old. My first specimen was a pebble containing some very rough quartz crystals, found at Tintagel in Cornwall during a family holiday in the summer of 1976.

That small Cornish pebble started a lifelong interest in minerals and collecting. I have always been fascinated not only by the beauty of mineral specimens, but by the information attached to them: where they came from, who found them, what geological setting produced them, how they were recorded, and how much knowledge can be lost if labels, localities, references, and specimen histories are not preserved.

Computing entered my life almost as early as mineralogy. In 1980 I was in a pilot class for one of the first groups of 10- and 11-year-olds in the UK to be taught computing as a permanent part of the school curriculum. I got my first home computer in 1982, and that same year, at the age of 12, I won a national competition in Popular Computing Weekly for a program I wrote about the periodic table of the elements in Prolog.

Looking back, that early program seems oddly predictive: it combined computing, chemistry, classification, structured information, and the need to make scientific data easier to explore. Those same ideas have followed me ever since.

I later studied geology at Imperial College, Royal School of Mines, London. I did not complete the course, leaving instead to pursue a full-time career in computing, but geology and mineralogy remained central interests.

During the 1990s I was involved in software development for the Commodore Amiga through Almathera Systems Ltd. I was project lead and senior developer for Photogenics, a 24-bit graphics and image manipulation package for the Amiga. We also published a pioneering range of CD-ROM titles. One of these was Fractal Universe for the Amiga CDTV, which I co-authored in 1992. It was endorsed by Arthur C. Clarke and used in his documentary Colours of Infinity.

For several years I was also involved in computer forensic work for police forces. This included forensic examinations, giving evidence in court, and providing expert advice to barristers. I also wrote for the International Journal of Forensic Computing. It was a fascinating and demanding area of work, requiring great care with evidence, accuracy, documentation, and the ability to explain technical issues clearly to non-technical audiences.

After that I worked in web development and database-backed systems, which eventually became the technical foundation for Mindat.org. What began as a private mineral database slowly became a public website, then a collaborative database, and eventually a major international mineralogical resource.

In 2014 I moved to working full-time on Mindat and related mineralogical data projects. In 2015, Mindat.org was donated to the Hudson Institute of Mineralogy, giving it a long-term not-for-profit educational home. I continue to work on Mindat and related mineralogical data systems through Mineral Analytics Ltd.

My work on Mindat has been recognised with the Mineralogical Society of America Distinguished Public Service Medal in 2011, and the Marsh Award for Mineralogy in the UK in 2019. Both awards mean a great deal to me, but Mindat has never been the work of one person alone. It exists because of the knowledge, generosity, patience, and sometimes very robust corrections of a global community of contributors and experts.

My main mineralogical interests are broad rather than narrow. I am interested in mineral localities, specimen provenance, historical data, mineral photography, labels, collections, and the way mineralogical information is recorded and transmitted. I am especially interested in how we can preserve information that might otherwise disappear: old labels, obscure references, locality changes, dealer histories, mine names, collection records, and the countless small details that make a specimen scientifically and historically useful.

Outside Mindat and mineral work, I am married and have one son. My hobbies include mineral collecting, reading, and travel. These overlap strongly with my work: travel often means visiting museums, localities, shows, or collections; reading often leads me back into mineral history; and collecting constantly reminds me why accurate information matters.

Mindat started as my personal database, but it belongs now to a much wider community. My hope is that it continues to help collectors, researchers, museums, students, and anyone curious about minerals to explore, document, and understand the mineral world.

Photos

BournoniteTrepça Mine, Kosovo
BoraciteBoulby Mine, North Yorkshire, UK
VarisciteClay Canyon, Utah
RhodochrositePotosí Mine, Mexico
ShattuckiteTantara Mine, DR Congo
GalenaJoplin Field, Missouri
QuartzTintagel Beach, Cornwall, UK
TronaFMC Green River Trona Mine, Wyoming
Marston marbleMarston Magna, Somerset, UK
MelanteriteTrepça Mine, Kosovo
AragoniteProfunda Mine, Spain
WavelliteHigh Down Quarry, Devon, UK
Tongrube Resse, Germany
PyriteClimping Beach, West Sussex, UK
TurquoiseGunheath China Clay Pit, Cornwall, UK
PyriteShakespeare Cliff, Kent, UK
PyriteDongchuan Cu ore field, China
AzuriteMineral Hill field, Australia
PyriteNavajún, Spain
LibethenitePodlipa deposit, Slovakia
BournoniteTrepça Mine, Kosovo
IlmeniteBentley Lake occurrence, Canada
CampyliteDry Gill Mine, Cumbria, UK
SideriteWheal Maudlin, Cornwall, UK
PyriteShakespeare Cliff, Kent, UK
MalachiteFitula Mine, Zambia
AmethystRio Grande do Sul, Brazil
EnstatiteSebkha el Melah 001 meteorite, Mali
AluminiteEast Cliff and Copt Point, Kent, UK
Stilbite-CaSgurr nam Boc, Highland, UK
LabradoriteNorcross labradorite quarry, Madagascar
BaryteHilton Mine, Cumbria, UK
MalachiteTsumeb Mine, Namibia
AzuriteLiufengshan Mine, China
Flint in situBirling Gap, East Sussex, UK
Chalk cliffsBirling Gap, East Sussex, UK
PseudomalachiteM'sesa Mine, DR Congo
At the Dallas Symposium
Ste Marie-aux-Mines show 2026
Ste Marie-aux-Mines show 2026
Ste Marie-aux-Mines show 2026
Ste Marie-aux-Mines show 2026
Ste Marie-aux-Mines show 2026
Ste Marie-aux-Mines show 2026
Ste Marie-aux-Mines show 2026
Ste Marie-aux-Mines show 2026

Photo Galleries

Only Fans
Updated 16th Jun 2026
Photo of the Day Classics
Updated 4th Jul 2017

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Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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