Tatiana Sieff
This is my face – hi!


Hello and welcome! I’m a 23 year old, breath of fresh air gemologist based in the heart of London. Formally, I am a freelance private engagement ring designer, diamond consultant & gemstone merchant.


In 2015, I obtained an undergraduate degree in Geography from the University of Southampton, achieving an upper second class with honours grade.

Later that year, I immediately threw myself into the magical diamond world. I further studied and became a graduate of the Gemological Institute of America (GIA), completing the Graduate Gemology, Pearl Graduate & Accredited Jewellery Professional diploma programmes.

My professional career in jewellery and gemology began in a global luxury jeweller, where I spent two years working in the high-profile client relations department. Afterwards, moved into a smaller, family-run firm in Hatton Garden where I had a wonderful position in diamond buying and selling. Working hard and continuously studying has proven to be absolutely invaluable to me.

SIEFF is my company: my new venture and full time job. I offer all sorts of handcrafted jewellery in a bespoke design service using top quality precious metals and gemstones. It is absolutely imperative to my beliefs that all my materials are sourced as ethically as possible. You can also sometimes find a few nice things in my Etsy store.

Furthermore, I run a blog called Gembark. It is dedicated to jewellery, gemstones and all else that glitters. A fun side-hustle to complement my full-time job.

This website is to be dedicated to the daily aspects of my life. I am considering here to be a central hub of my internet presence. You can find a variety of things: all the social media projects I’m working on, any freelance or guest writing links, life updates & PUPPY UPDATES for a little bit of fun on the side!


You can view my LinkedIn here for professional reference and you can contact me at tatiana@sieff.co