Diamonds made
for your story.
A boutique jeweller crafting one-of-a-kind engagement rings and fine pieces around ethically sourced diamonds.
A few of our favourites
Natural or lab-grown,
explained plainly
What is the actual difference?
Chemically, none. Both are the same carbon crystal, with the same fire and the same hardness. One formed in the earth over billions of years, the other in a lab over a few weeks.
Can anyone tell them apart?
Not by eye, and not under a loupe. Only specialist equipment can. That is why every stone is independently graded before it reaches you: lab-grown by IGI, natural by GIA, papers included.
So which should I choose?
Whichever suits your budget and how you feel about it. Lab-grown buys a larger or cleaner stone for the same spend. Natural carries a rarity that matters a great deal to some people and not at all to others. We will walk you through both and push you toward neither.
Say yes without holding your breath
Complimentary resizing
One free resize, so it sits exactly right.
Independent certification
Lab-grown graded by IGI, natural by GIA. Papers included.
Insurance valuation
A written valuation for your insurer, provided with delivery.
Neither natural nor lab-grown diamonds are investments. Retail mark-up means almost any ring is worth well below what you paid the moment you leave any store. You are buying beauty and meaning, not an asset, and we will always tell you so.
From idea to heirloom
Consult
We meet, in the city or wherever suits, to talk through style, stone and budget.
Design
You will see sketches and a to-scale rendering of your piece before anything is made.
Create
Your diamond is selected and certified, then set by hand by our jeweller.
Deliver
Your finished piece arrives boxed and certified, with its insurance valuation.
Bespoke jewellery,
made simple.
Leumier & Co. was founded on a simple belief: creating a piece that's truly yours shouldn't be complicated, and it shouldn't cost a fortune either.
Designed in Melbourne by our jeweller, trained at one of Europe's finest jewellery schools, every piece is custom made from the ground up. No two are exactly alike, and no design is finalised until it's exactly right.
We work with ethically sourced GIA-certified natural diamonds and IGI-certified lab-grown diamonds, explained in plain terms, with no jargon, so you can choose the one that tells your story.
From the first sketch to the final design, each piece is shaped entirely around you. Made simple, made accessible, and made genuinely, unmistakably yours.
Let's design
something lasting
Tell us a little about what you have in mind and we will arrange a time to meet.