G.F.Williams & Co

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G.F.Williams & Co We are trusted long-standing suppliers of Sapphire, Ruby, Emerald and other fine coloured gemstones

17/07/2026

RUBY AND RUBELLITE: MORE DIFFERENT THAN YOU THINK ❤️

Their names sound similar, but Ruby and Rubellite are very different gemstones.

Ruby gets its famous red colour from chromium, while Rubellite owes its colour to manganese and iron.

One fascinating result of this difference is fluorescence. Rubies rich in chromium often glow dramatically under ultraviolet light, while the iron content in many rubellites can suppress this effect entirely.

Gemmology never stops surprising us.

06/07/2026

WATERMELON TOURMALINE 🍉

Can’t decide between pink or green?

Luckily, nature already made the choice for you.

These delightful bi-colour tourmalines are affectionately known as Watermelon Tourmalines thanks to their pink and green colouring.

Each stone is completely unique, making them a favourite amongst collectors and jewellery designers alike.

We currently have a small selection of these miniature treasures in stock. Perfect for experimenting with new jewellery designs or adding something a little different to a collection.

💎 Watermelon Tourmaline – 0.61cts (GXEA09)

Give us a call if you’d like to see what else we have available.

01/07/2026

WOULD YOU RECOGNISE THIS GEMSTONE? 🌷

Many people know rhodochrosite in its distinctive banded form.

But every so often, material of sufficient quality is found to create faceted gemstones like these.

Their soft pinkish-orange colour is unlike almost anything else in the gem world and instantly catches the eye.

Rhodochrosite is relatively soft, making it better suited to collectors or carefully designed jewellery pieces, but its beauty makes it worth the extra care.

💎 Rhodochrosite Pair – 1.42cts each (JTBA65)

Available in Hatton Garden or online

24/06/2026

MOONLIGHT CAPTURED IN A GEMSTONE 🌙

There’s something undeniably enchanting about Moonstone.

Its soft glow appears to float beneath the surface, creating an ethereal effect known as adularescence.

This impressive 6.11ct example has a wonderful presence and displays the dreamy appearance that has inspired myths and legends across countless cultures.

💎 Moonstone – 6.11cts (JGBB38)

Available in Hatton Garden or order online

BIG, BOLD AND IMPOSSIBLE TO IGNORE 💎Sometimes size really does make a statement.At over 63 carats, this beautifully cut ...
17/06/2026

BIG, BOLD AND IMPOSSIBLE TO IGNORE 💎

Sometimes size really does make a statement.
At over 63 carats, this beautifully cut quartz commands attention from every angle.

The crisp faceting on top, known as checkerboard, and impressive proportions allow the stone to dance with light, creating a display that’s impossible to overlook.
Often referred to as Olive in colour, this gemstone fits right in with the muted colours of the fashion world right now- very 90’s.

Whether destined for a dramatic jewellery piece or a collector’s cabinet, this is a gemstone that knows how to make an entrance.

💎 Quartz – 63.37cts (HNMA09)

08/06/2026

A LITTLE BIT DIFFERENT 🦉✨

Every now and then, something arrives that makes us smile.

This charming carved opal owl is one of those pieces.

The carving beautifully showcases the opal’s famous play-of-colour, with flashes of blues, greens and fiery tones dancing across its surface.
Combined with the owl design, it creates an almost mystical midnight appearance.

We have a few unusual carved opals tucked away in the drawers—let us know if you’d like to see more.

💎 Carved Opal Owl – 8.09cts (IBHA39)

Available in Hatton Garden or order online

08/06/2026

A HEART WITH ENDLESS POSSIBILITIES 💗

At first glance, this might look like a simple heart-shaped gemstone.

Look a little closer.

This clever design is actually made up of three separate pieces: a central princess cut accompanied by two matching half-moon stones.

This combination means endless design possibilities; create a striking pendant, a unique ring, or even transform them into a beautifully balanced pair of earrings as we have one more in stock!

💎 Pink Heart Set – 0.60cts (AUMA12)

Available in Hatton or online

Do you have a moment for something close to our hearts? ♥️ The SJC is an amazing charity supporting those within our ind...
21/04/2026

Do you have a moment for something close to our hearts? ♥️

The SJC is an amazing charity supporting those within our industry providing financial support to those who need it.

They span the whole industry from jewellers, silversmiths, dealers and other associated trades. 💍

Will Evans from is taking part in the London Marathon this weekend in support of the Silversmiths and Jewellers Charity. 🏃‍♀️

This year are matching the funding so your support will stretch that extra mile.

If you can help support Will and the Silversmiths and a Jewellers Charity please donate by copy and pasting the link:

https://www.justgiving.com/page/will-evans-26-2

15/04/2026

Have you heard of a Padparadscha? 🧐

Named after the Sinhalese word for lotus blossom 🪷 These stones range from a deep orangy pink to a much lighter pinkish orange 🍊

This one in particular has a special ‘Je ne sais quoi’ as it also has a shimmer of purple running through it which gives it a one off look.

We will be closed today for the funeral of Geoffrey Williams, founder of G.F Williams & Co.13.01.41 ~ 01.03.26
10/04/2026

We will be closed today for the funeral of Geoffrey Williams, founder of G.F Williams & Co.

13.01.41 ~ 01.03.26

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London

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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+442074055477

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