{"id":2154,"date":"2026-10-26T01:13:17","date_gmt":"2026-10-26T01:13:17","guid":{"rendered":"https:\/\/oecler.com\/portuguese-cut-lab-grown-diamond\/"},"modified":"2026-10-26T01:13:17","modified_gmt":"2026-10-26T01:13:17","slug":"portuguese-cut-lab-grown-diamond","status":"publish","type":"post","link":"https:\/\/oecler.com\/zh\/portuguese-cut-lab-grown-diamond\/","title":{"rendered":"Portuguese Cut Lab-Grown Diamonds: Facets, Fire, and When to Custom-Cut"},"content":{"rendered":"

Oecler cuts Portuguese cut lab-grown diamonds to order. The cut uses many more facet rows than a modern round brilliant, so the light pattern looks denser and more layered; round brilliants usually return more even white light. This guide covers what a Portuguese cut lab-grown diamond is, how it differs from a round brilliant, when ready stock versus cut-to-order makes sense at Oecler, and how to order one\u2014including settings, metals, certificates and FAQ.<\/p>\n\n\n\n

What is a Portuguese cut lab-grown diamond?<\/h2>\n\n\n\n

A Portuguese cut lab-grown diamond is a laboratory-grown diamond faceted with a specialty multi-row facet plan, usually on a round outline. Under the U.S. FTC Jewelry Guides, sellers must clearly disclose that a laboratory-created stone is not mined, for example by placing \u201claboratory-grown\u201d or \u201clab-grown\u201d right before the gem name (FTC<\/a>). Oecler describes every stone it sells as lab-grown.<\/p>\n\n\n\n

GIA \u8bf4\u660e\uff0c\u5b9e\u9a8c\u5ba4\u57f9\u80b2\u94bb\u77f3\u4e0e\u5929\u7136\u94bb\u77f3\u5177\u6709\u57fa\u672c\u76f8\u540c\u7684\u5316\u5b66\u6210\u5206\u3001\u6676\u4f53\u7ed3\u6784\u4e0e\u5149\u5b66\u6027\u8d28\u3002GIA 4Cs<\/a>). A Portuguese cut lab-grown diamond from Oecler is a newly grown and newly cut stone. It is not an antique, even when the facet language is inspired by vintage faceting.<\/p>\n\n\n\n

Trade writing often cites facet counts around 161 or more for Portuguese cuts, with published ranges commonly spanning about 144 to 200 or more. Exact counts vary by cutter and design, so Oecler does not treat any single number as official. What stays consistent is the idea: many more, smaller facets stacked in crown and pavilion rows than a modern round brilliant\u2019s typical 57\u201358 facets.<\/p>\n\n\n\n

A deeper pavilion is common on Portuguese cuts. Face-up size can therefore look smaller than the carat weight alone suggests, which is worth weighing before you lock carat target and outline. Oval, cushion and other non-round Portuguese outlines usually need custom cutting rather than a stock round plan.<\/p>\n\n\n\n

Lab-grown colored gemstones at Oecler are offered in standard cuts only. They are not cut in Portuguese or other custom fancy or irregular plans, because cutting methods and hardness differ from diamonds\u2014the same diamonds-only rule that applies to kite and kitty custom cuts (see the custom-cut lab-grown diamonds guide<\/a>).<\/p>\n\n\n\n

Portuguese cut vs round brilliant<\/h2>\n\n\n\n

A modern round brilliant is typically cut with 57 or 58 facets and is engineered for consistent brilliance\u2014white light return\u2014and familiar scintillation (GIA 4Cs<\/a>). A Portuguese cut stacks many more, smaller facets in rows on the crown and pavilion. Face-up, that usually reads as a denser, more complex pattern; under warm indoor light, buyers often describe more layered or kaleidoscopic flashes.<\/p>\n\n\n\n

The two looks behave differently. Round brilliants usually return cleaner, more even white light. Portuguese cuts usually show denser facet play and more complex flashes. Oecler does not claim that a Portuguese cut has more fire than a round brilliant, or that it outperforms one. Trade writing and optical models do not always agree on that point, so the useful choice is which light pattern you prefer\u2014not a single \u201cbetter sparkle\u201d ranking.<\/p>\n\n\n\n

Portuguese cutting is also more labor-intensive. Finished carat cost is usually higher for the cutting work, not because lab-grown diamond material is rarer. A deeper pavilion can further shift how much face-up spread you get for a given weight.<\/p>\n\n\n\n

\n
\u7279\u5f81<\/th>Portuguese cut (typical)<\/th>Modern round brilliant (typical)<\/th><\/tr><\/thead>
Facet plan<\/td>Multi-row crown\/pavilion; often cited around 161+ facets (counts vary)<\/td>Usually 57\u201358 facets<\/td><\/tr>\n
Face-up light<\/td>Denser, more layered \/ complex flashes<\/td>Cleaner, more even white return<\/td><\/tr>\n
Pavilion<\/td>Often deeper \u2192 face-up can look smaller for the carat<\/td>Engineered for familiar spread and brilliance<\/td><\/tr>\n
\u5728 Oecler<\/td>Lab-grown diamonds, cut to order (default)<\/td>Lab-grown diamonds in ready and made-to-order jewelry<\/td><\/tr>\n<\/tbody><\/table><\/figure>\n\n\n\n

For buyers who like older cutting language, Oecler\u2019s old European cut lab-grown diamond guide<\/a> covers another vintage-inspired round style with different proportions and a different light pattern from both modern rounds and Portuguese cuts.<\/p>\n\n\n\n

Ready stone vs cut-to-order at Oecler<\/h2>\n\n\n\n

Cut to order is the default for Portuguese at Oecler.<\/strong> Marie confirmed that Oecler cuts Portuguese cut lab-grown diamonds to order. As with kite and kitty custom fancy shapes, Oecler does not quote a fixed day count for the cut itself.<\/p>\n\n\n\n

Ready \/ in-stock.<\/strong> If a Portuguese cut lab-grown diamond is listed under loose stones<\/a> or \u57f9\u80b2\u94bb\u77f3<\/a>, that listed SKU ships within 3 days. At brief time there is no confirmed live Portuguese SKU, so shoppers should ask; most Portuguese pieces will be commissioned rather than pulled from stock. Oecler does not invent inventory in this guide.<\/p>\n\n\n\n

Custom Portuguese oval (and other non-round outlines).<\/strong> Treat these as a custom fancy outline plus a Portuguese-style facet plan. Approve length-to-width, facet style and setting before cutting starts. Loose stones and custom pieces at Oecler are final sale.<\/p>\n\n\n\n

Contrast with standard cuts.<\/strong> Out-of-stock standard<\/em> cuts (not Portuguese \/ custom fancy) are cut to order and ship in about 2 weeks. That about-2-weeks figure does not<\/strong> apply to Portuguese or other custom fancy cutting.<\/p>\n\n\n\n

Made-to-order jewelry.<\/strong> Once the stone is set into a ring or other piece, production takes 3\u20135 weeks, then 7\u201310 days in transit, with free DDP shipping to the US, UK and Australia.<\/p>\n\n\n\n

Marie, the founder of Oecler, sources the lab-grown stones herself, directly at the origin in Henan. That sourcing step comes before the Portuguese cutting plan: the available rough or preform has to support the facet rows and outline you want.<\/p>\n\n\n\n

Settings, metals and daily wear<\/h2>\n\n\n\n

Solitaire, halo and vintage-inspired heads all show a Portuguese multi-row pattern well. Because a deeper pavilion is common, agree head height with the cutter and setter before the proportions are locked.<\/p>\n\n\n\n

When a Portuguese cut lab-grown diamond is set into jewelry, Oecler uses solid 14K or 18K yellow gold, solid 14K or 18K white gold, or platinum. Point protection matters mainly when the outline has sharp corners (for example some ovals); as with other custom shapes, Oecler can prong-set or bezel-set those points. Shoppers exploring mounts can start from engagement rings<\/a>, the custom<\/a> page or the ring customizer<\/a>.<\/p>\n\n\n\n

For proof of Oecler\u2019s custom-cut capability on lab-grown diamonds (not Portuguese examples), see the live kite-shaped lab-grown diamond<\/a> and kitty cut lab-grown diamond<\/a> product pages\u2014labeled as kite and kitty only.<\/p>\n\n\n\n

How to order a Portuguese cut from Oecler<\/h2>\n\n\n\n
  1. \u5206\u4eab\u8f6e\u5ed3\u3002<\/strong> Round Portuguese, custom Portuguese oval or another outline\u2014with a rough length-to-width if the outline is not round\u2014and the intended use (ring, pendant, loose stone).<\/li>
  2. \u786e\u8ba4\u523b\u9762\u98ce\u683c\u4e0e\u76ee\u6807\u514b\u62c9\u3002<\/strong> Multi-row Portuguese plan versus another style, and whether face-up spread or weight matters more if a deeper pavilion forces a trade-off.<\/li>
  3. \u786e\u8ba4\u9576\u5d4c\u3002<\/strong> Head height for a deeper pavilion; prong or bezel if corners need protection; metal among solid 14K or 18K yellow or white gold or platinum if the piece will be mounted.<\/li>
  4. \u5f00\u5207\u524d\u7b7e\u5b57\u786e\u8ba4\u3002<\/strong> Loose stones and custom pieces are final sale, so outline and facet plan should be approved before the cutter starts.<\/li>
  5. \u4e0b\u5355\u65f6\u51b3\u5b9a\u662f\u5426\u8981\u62a5\u544a\u3002<\/strong> \u8bc1\u4e66\u53ef\u6309\u9700\u63d0\u4f9b\uff1b\u9ed8\u8ba4\u53d1\u8d27\u4e0d\u9644\u8bc1\u4e66\uff08\u8be6\u89c1\u4e0b\u6587\uff09\u3002<\/li><\/ol>\n\n\n\n

    \u9700\u8981\u8bb0\u4f4f\u7684\u5de5\u671f<\/strong><\/p>\n\n\n\n