Rubies

Rubies are the red variety of corundum — the same mineral species as sapphire, coloured by chromium and rated 9 on the Mohs scale, among the hardest gemstones in everyday wear. Unlike our sapphires, we do not mine rubies: they are hand-selected in Ceylon and beyond by our FGAA gemmologist, through relationships three generations in the Sri Lankan gem fields have built. Most rubies on the market are heated to improve colour. We hold both heated and unheated stones, and we tell you which is which.

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Our rubies travel a short chain: cutter to our Sydney bench to you, with no traders in between. Every stone is examined by our own FGAA gemmologist, with heat status and any filling or clarity treatment stated up front, independent laboratory reports arranged on request, and free lifetime re-authentication.

Common questions

How much does a ruby cost per carat in Australia?

Price depends almost entirely on colour, clarity and whether the stone has been heated. In AUD, commercial heated rubies commonly run $300 to $1,500 a carat; well-cut stones of fine red colour sit around $3,000 to $10,000 a carat; and unheated stones of top colour can exceed $30,000 a carat. Lead-glass composites sell for a few dollars a carat and are not comparable.

Are rubies heated, and does heating matter?

Most are. Heating at high temperature to improve colour and dissolve silk is a long-established, permanent and accepted treatment, and the great majority of rubies sold worldwide have had it. Unheated stones of equal quality are far scarcer and priced accordingly, often several times higher. What matters is that heat status is disclosed and, for significant stones, confirmed by an independent laboratory.

What is a lead glass filled ruby?

A composite: low-grade, heavily fractured corundum whose cracks are filled with high-lead glass so the stone looks transparent and red. It is cheap and often described only as ruby. The glass can be damaged by household cleaners, jewellers' pickle and even lemon juice, and the stone cannot be safely resized or repaired with normal bench heat. We do not sell them.

What does pigeon's blood mean in a ruby?

It is a trade term for the finest red, a vivid slightly purplish red with strong fluorescence. It is not a species, an origin or a guarantee: it is a colour opinion issued by a laboratory, and different laboratories apply it differently. Ask which laboratory used the term and read the report, because the words alone verify nothing.

Bespoke · Designed Around Your Stone

Not quite what you pictured? Design it around your stone.

Choose the sapphire first, then the piece, with our FGAA-qualified gemmologist at your side. Most commissions leave our own workshop in two to four weeks.

CLIENT WORDS

In the Words of Our Clients

5.0 out of 5 on Google

Ministry of Gems® holds a rating of 5.0 out of 5 on Google. Five of those reviews are reproduced in full here — covering bespoke ring commissions, loose sapphire purchases and trade supply — and every one can be verified independently on Google, where reviews cannot be edited or deleted by the business they describe.

“Went to their website & made an appointment… Sasha took me through the steps and fine tuned the design with a video call. 2 weeks later got the ring delivered. Prices are amazing and what a lovely team. Highly recommend!”
5 out of 5 · Andy M. · verified Google review
“Got a really nice unheated pink sapphire for my girlfriend… made it so easy and cost effective. I learnt so much about the industry and now go to them for all professional opinions on gems and jewels! Could not give a higher recommendation.”
5 out of 5 · Charles R. · verified Google review
“Spoke with the team for my custom ring and the whole process was smooth… Very happy with the beautiful diamond ring and will definitely return for future purchases.”
5 out of 5 · Imendra F. · verified Google review
“I was really happy with the quality of gem stones as well as the services provided. Ministry of Gems exceeded my expectations, will definitely be buying more!”
5 out of 5 · Vishwa P. · verified Google review
“I use this platform to order gemstones for my clients, it’s very convenient.”
5 out of 5 · Ekaterina G. · trade client · verified Google review