Guru Diam is a trade-only wholesale diamond and jewellery supplier for jewellers in Australia and New Zealand, shipping from New York. We hold 10,000+ IGI and GIA certified diamonds, natural and lab-grown, plus calibrated melee, matched pairs, fancy colours, antique cuts and 3,000+ finished jewellery pieces ready to ship. Custom jewellery starts with a 3D CAD in 24 hours, with no minimum order. In-stock orders confirmed before 6 PM New York time ship the same day, and international delivery typically takes 3–4 business days.
This page is for jewellery retailers, designers, manufacturers and bench jewellers in Sydney, Melbourne, Brisbane, Perth, Adelaide, Auckland and across Australia and New Zealand. We supply businesses only. If you are shopping for your own ring, please visit a local jeweller: many of them buy from us.
Read on for what we stock, how the time difference works in your favour, how to open a trade account, and the questions Australian and New Zealand jewellers ask before their first order. To skip ahead, apply for a trade account and your account manager will be in touch the same business day.
Wholesale Jewellery Australia: Guru Diam at a Glance
| Topic | Detail |
|---|---|
| Customers | Trade only: jewellers, retailers, designers, manufacturers |
| Certified inventory | 10,000+ IGI and GIA certified diamonds; GCAL also offered for lab-grown |
| Loose diamonds | Natural and lab-grown: certified, melee, matched pairs, fancy colour, antique and old cuts |
| Finished jewellery | 3,000+ pieces in stock: tennis, studs, engagement rings, bands, pendants |
| Dispatch | Same day from New York on orders before 6 PM Eastern |
| International delivery | Typically 3–4 business days |
| Minimum order | None |
| Custom manufacturing | 24-hour CAD; 4–6 working days after approval; rush in 4 days (extra charge) |
| Account approval | Same business day if submitted before 4 PM Eastern |
| Returns | 14-day free return on stock items, international orders included |
Why Australian and New Zealand Jewellers Buy From New York
Australia has a strong local jewellery trade, but local wholesalers cannot hold every shape, size and grade a client might ask for. When a client wants a 3 carat elongated cushion, a matched pair of pears or a run of 1.5 mm melee for a pavé band, the usual answer is "we will have to order it in", followed by a wait.
Guru Diam is based at 36 West 47th Street in New York's Diamond District, and we keep a large certified inventory on hand rather than sourcing each request from scratch. For an Australian or New Zealand jeweller, that adds up to:
- More of what clients ask for, in stock. 10,000+ certified diamonds and 3,000+ finished pieces.
- One account for the whole job. The centre diamond, side diamonds, melee and the setting itself.
- Fast international delivery. Same-day dispatch on in-stock items and delivery typically in 3–4 business days.
- A bench on call. Custom manufacturing with a 24-hour CAD and no minimum order.
How the Time Difference Works for You
New York and the east coast of Australia are roughly half a day apart, and that gap can work in your favour. Our same-day cut-off is 6 PM Eastern, which falls on the following morning in Australia and New Zealand: roughly 8–10 AM in Sydney and Melbourne depending on the time of year, early morning in Perth, and late morning in Auckland.
In practice, that means an order you confirm with us first thing in the morning in Sydney can still leave New York that same Eastern evening. Equally, a question you send us at the end of your day is often answered while you sleep, so a CAD render or a set of diamond options is waiting in your inbox when you open the store the next morning.
| City | Same-day cut-off (6 PM Eastern) in local time |
|---|---|
| Sydney, Melbourne, Canberra | Next morning, roughly 8–10 AM depending on the season |
| Brisbane | Next morning, roughly 8–9 AM |
| Adelaide | Next morning, roughly 7:30–9:30 AM |
| Perth | Next morning, roughly 6–7 AM |
| Auckland | Next day, roughly 10 AM–midday |
Lab-Grown Diamonds Wholesale for Australian Jewellers
Lab-grown diamonds have become a mainstream request at Australian bridal counters, especially for larger centre diamonds. We stock lab-grown diamonds in all popular shapes and sizes, IGI graded, with GCAL certification also available on lab-grown. Our lab-grown production is mostly CVD, with some HPHT, and every certified diamond is listed with its grading report.
Common requests from Australian and New Zealand jewellers include:
- Round, oval, pear, emerald and radiant centres from 1 to 5 carats
- Elongated cushions and ovals in specific length-to-width ratios
- Larger certified lab-grown centres for statement rings
- Diamonds sourced or cut to a client's exact specification when they are not in stock
See the range on our lab-grown diamonds page, and read our guide on sourcing GIA and IGI certified lab-grown diamonds wholesale.
Natural diamonds
We also supply natural diamonds for clients who ask for them: browse certified natural diamonds and natural melee. Natural matched pairs are made to order.
Wholesale Melee Diamonds, Calibrated for Pavé and Tennis Work
Every setter knows the cost of a badly calibrated parcel: hours spent sorting, diamonds that sit high or low, and a finished band that does not look even. Our melee is calibrated to ±0.05–0.10 mm, and our lab-grown melee is CVD Type IIa. You order by millimetre size, so a design that calls for 1.3 mm and 1.5 mm gets exactly those sizes.
Calibrated melee is the foundation of pavé bands, halos, cluster rings, eternity bands and tennis bracelets. See sizes on our wholesale melee page, or read our guide to calibrated melee for pavé, tennis and eternity work.
Matched Pairs, Fancy Colours and Antique Cuts
Matched pairs. Our pairs are matched to ±0.1–0.2 mm and within about one colour grade, for stud earrings and three-stone side diamonds that look balanced once set. Lab-grown pairs are available in all shapes; natural pairs are made to order.
Fancy colours. We carry fancy colour diamonds in seven colours: black, blue, brown, green, pink, red and yellow.
Antique and old cuts. For vintage-style pieces, we carry so many antique cuts, including Old Mine and Old European cut diamonds. See the antique and fancy colour wholesale page, or read about antique-cut lab-grown diamonds wholesale.
Finished Wholesale Jewellery, Ready to Ship
For stores that want finished stock rather than loose diamonds, we keep 3,000+ jewellery pieces ready to ship. Diamond quality in our jewellery is D–F colour and VVS–VS clarity, with IGI certification.
| Line | Range |
|---|---|
| Tennis bracelets | 2–32 ct total weight; 7-inch standard always in stock; other lengths made to order |
| Tennis necklaces | 17-inch standard; 16–22 inches made to order; straight-line up to 90 ct, graduated up to 55 ct |
| Stud earrings | All shapes; up to 10 ct total weight in stock; push-back or screw-back; 2 ct total weight and up IGI certified |
| Engagement rings | Solitaire, three-stone and halo; size 7 standard in stock |
| Pendants | Supplied with a 16–18 inch cable chain |
| Mountings and semi-mounts | Ready for your own centre diamond |
Metals are 14K and 18K gold (yellow, white and rose) and platinum. White gold is always rhodium plated, finishes are high polish by default, and findings are solid gold in the piece's karat. Browse the range on our wholesale jewellery page.
Custom Jewellery Manufacturing for Australian Jewellers
Plenty of Australian stores sell custom work without employing a full workshop. Our custom jewellery service is designed for exactly that: we are the bench, and you keep the client and the margin.
- Brief us. Send a sketch, a photo or a description: piece type, metal, centre diamond, size.
- Approve the CAD. A 3D CAD render arrives within 24 hours, often overnight thanks to the time difference. Nothing is cast until you approve it.
- Production. We cast, set and finish in-house in New York and India, using diamonds from our own inventory.
- Delivery. The piece is finished 4–6 working days after CAD approval (complex pieces 2–3 weeks), then shipped internationally, typically arriving in 3–4 business days.
There is no minimum order and you pay per piece. Rush service guarantees delivery in 4 days for an extra charge. Private label production, engraving, satin, matte and hammered finishes, and after-sales resizing and repairs are all available. Read our wholesale custom jewellery manufacturer guide or what custom jewellery costs wholesale.
Shipping to Australia and New Zealand
| Stage | Timing |
|---|---|
| Cut-off | 6 PM Eastern for same-day dispatch of in-stock items |
| Dispatch | Same day from New York |
| International delivery | Typically 3–4 business days |
| Custom pieces | 4–6 working days after CAD approval, then shipping |
We ship to jewellers in every Australian state and territory and across New Zealand. Full details are on our shipping and returns page.
Wholesale Diamonds Sydney, Melbourne, Brisbane and Perth
Sydney
Sydney jewellers working the bridal market need a steady supply of certified centres in the shapes that are trending, often in sizes local stock does not cover. With our cut-off landing on Sydney's next morning, a Sydney store can confirm a diamond at the start of the day and have it dispatched from New York that Eastern evening.
Melbourne
Melbourne has a large community of independent designers and manufacturing jewellers. Many use outside manufacturing for overflow work or for pieces that need a CAD fast. Our 24-hour CAD and no-minimum custom service suits short design runs and one-off commissions.
Brisbane and the Gold Coast
Queensland stores often carry finished stock, especially tennis bracelets and studs. Our 7-inch tennis bracelet is always in stock and studs up to 10 ct total weight are in stock, so you can restock best-sellers without large minimums.
Perth and Adelaide
For jewellers further west, the cut-off falls very early in the morning, which means an order confirmed the previous afternoon is usually already on its way. Calibrated melee and matched pairs are popular orders for Perth and Adelaide benches.
New Zealand
We supply jewellers in Auckland, Wellington, Christchurch and across New Zealand on the same terms as Australia: same-day dispatch on in-stock items, international delivery typically in 3–4 business days, no minimum order and a 14-day free return on stock items.
How to Send a Request That Gets a Fast Answer
Because most of our working day overlaps with your night, a complete request lets us finish the work before you open the next morning. These details help us answer in one pass:
| Request type | What to include |
|---|---|
| Centre diamond | Shape, carat range, colour and clarity range, lab-grown or natural, preferred lab (IGI, GIA or GCAL), ratio if elongated, budget |
| Melee | Millimetre sizes and quantities per size, lab-grown or natural, colour range |
| Matched pair | Shape, size per diamond, colour and clarity range, or the measurements of the centre the pair will sit beside |
| Custom piece | Sketch or photo, metal and colour, finger size, centre diamond details, finish, any engraving |
| Finished jewellery | Stock number, or style, total weight, length or size and metal |
Send it by WhatsApp, email or through your account manager, and it will be picked up during the New York working day.
Opening a Trade Account From Australia or New Zealand
- Apply. Complete the trade partner application.
- Verification. We confirm your business is in the jewellery trade. Applications submitted before 4 PM Eastern are approved the same business day; later ones the next business day. Because of the time difference, an application sent in the morning in Australia usually arrives during the New York working day.
- Your account manager. Each account has a dedicated account manager for sourcing, quotes and order updates.
- Order. Use the website, WhatsApp, phone, our live order portal for custom work, or our API and CSV feed.
Payment and Returns
We accept wire transfer, ACH, cheque and debit card. Established accounts can apply for credit terms, and memo terms are available for approved accounts. We do not accept credit cards.
Stock items come with a 14-day free return, and international orders are included. For custom pieces, confirm the terms with your account manager before you approve the CAD.
Diamond Quality and Certification
Every certified diamond we sell comes with its grading report from IGI or GIA, and GCAL certification is offered for lab-grown diamonds. Reports are listed with each diamond, so your staff and your clients can check colour, clarity, cut and measurements before an order is confirmed. In our finished jewellery, diamonds are D–F colour and VVS–VS clarity, with IGI certification, and studs of 2 ct total weight and up come IGI certified.
Integrating Our Inventory Into Your Store
Australian online jewellers and multi-store retailers can connect our inventory to their own systems through our API and CSV feed, so certified diamonds and jewellery can be shown on your website without manual uploads. Your account manager can set this up once your account is open.
Diamond Wholesaler Australia: What to Compare
| Question | Why it matters | Guru Diam |
|---|---|---|
| How much is genuinely in stock? | Stock ships today; sourcing takes days | 10,000+ certified diamonds, 3,000+ jewellery pieces |
| Minimum order? | Minimums lock up cash | None |
| Melee calibration? | Loose tolerances cost bench time | ±0.05–0.10 mm |
| Pair matching? | Uneven pairs show once set | ±0.1–0.2 mm, about one colour grade |
| Custom turnaround? | Clients will not wait a month | 24-hour CAD; 4–6 working days |
| Delivery time? | Speed closes the sale | Typically 3–4 business days internationally |
| Returns? | Protects your margin | 14-day free return on stock items |
For a broader comparison, read our guide to the best wholesale lab-grown diamond suppliers for trade buyers.
Planning Tools
Use our diamond size chart to convert carats to millimetres by shape, the ring size chart before a CAD is drawn, and our lab-grown diamond price list as a starting point for quotes. Exact trade pricing shows once your account is open. Our education centre is useful for training new staff.
A Typical Order From a Melbourne Jeweller
Here is how a common commission runs end to end for a store in Melbourne or Sydney.
On a Thursday afternoon, a couple asks for a 2.5 carat elongated oval solitaire with a hidden halo in platinum, plus a matching wedding band. Before closing, the jeweller shortlists three IGI-certified ovals on our website and sends a WhatsApp message to our diamond desk with the shortlist and a phone sketch of the ring.
Overnight, while Melbourne sleeps, the New York team confirms the ratios and measurements of each oval, picks calibrated melee for the halo and the band, and drafts the 3D CAD. On Friday morning the jeweller opens the store to the diamond options, the melee spec and the CAD render with its platinum weight already in the inbox.
The couple approves the CAD over the weekend. The ring and band are finished 4–6 working days later and shipped from New York, typically arriving in 3–4 business days. The store has handled one supplier and one account manager for the centre diamond, the melee and the finished pieces, and the client has a custom ring in roughly two weeks.
Building a Lab-Grown Bridal Range Without Overstocking
Many Australian and New Zealand stores want a lab-grown bridal offer but do not want to tie up cash in a large inventory of centre diamonds. Because there is no minimum order, a common approach is to stock a small set of mountings and semi-mounts in the store's best-selling styles and order the centre diamond per client.
- Display. Keep a few solitaire, three-stone and halo mountings in 14K, 18K and platinum to show clients the styles.
- Sell from inventory. Show clients certified diamonds from our live inventory on a screen in the store, with their grading reports.
- Order per client. Confirm the diamond, and either set it locally or have us set it and ship the finished ring.
- Restock best-sellers. Reorder tennis bracelets and studs as they sell, rather than buying deep stock up front.
This keeps the display fresh, keeps cash free, and still gives clients the depth of choice that 10,000+ certified diamonds offers.
About Guru Diam
Guru Diam serves 3,000+ trade accounts and is a member of the Jewelers Board of Trade (JBT). Our certified diamonds carry IGI or GIA reports, with GCAL also offered for lab-grown. If you visit New York, you can see inventory at our Diamond District showroom by appointment: book a visit. More about us.
FAQ
Do you supply wholesale jewellery and diamonds to Australia?
Yes. Guru Diam is a trade-only wholesaler that supplies jewellers, retailers, designers and manufacturers in Australia and New Zealand from New York, with 10,000+ certified diamonds and 3,000+ finished jewellery pieces in stock.
How long does delivery to Australia take?
In-stock orders confirmed before 6 PM Eastern ship the same day from New York, and international delivery typically takes 3–4 business days. The cut-off falls on the following morning in Sydney and Melbourne.
Do you ship to New Zealand?
Yes. New Zealand jewellers get the same terms as Australia: same-day dispatch on in-stock items, delivery typically in 3–4 business days, no minimum order and a 14-day free return on stock items.
Is there a minimum order?
No. One diamond or one piece of jewellery is an order.
How quickly is an Australian trade account approved?
Applications submitted before 4 PM Eastern are approved the same business day, and later ones the next business day. A morning application from Australia usually arrives during the New York working day.
Can you manufacture custom jewellery for Australian stores?
Yes. We send a 3D CAD within 24 hours and finish the piece 4–6 working days after approval, then ship it. Complex pieces may take 2–3 weeks. Rush service guarantees 4 days for an extra charge, and there is no minimum order.
What is your return policy for Australian orders?
Stock items have a 14-day free return, and this includes international orders shipped to Australia and New Zealand.
How do Australian accounts pay?
By wire transfer, ACH, cheque or debit card. Established accounts can apply for credit terms, and memo terms are available for approved accounts. Credit cards are not accepted.
Ready to order? Open a trade account, or explore our wholesale hub, lab-grown diamonds, wholesale melee and custom jewellery pages. WhatsApp our diamond desk at +1 (929) 340-3449.
