# Oval gem design

**URL:** <https://discourse.shapr3d.com/t/oval-gem-design/39850>\
**Category:** Modeling Questions\
**Created:** [November 25, 2025, 2:40pm UTC](https://discourse.shapr3d.com/t/oval-gem-design/39850 "2025-11-25T14:40:05Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![pali](https://avatars.discourse-cdn.com/v4/letter/p/5f8ce5/32.png) [@pali](https://discourse.shapr3d.com/u/pali)\
**Post date:** [November 25, 2025, 2:40pm UTC](https://discourse.shapr3d.com/t/oval-gem-design/39850/1 "2025-11-25T14:40:05Z")

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Hi guys! I want to design an oval sapphire with a length of 8.5mm, a width of 6.5mm and a heigth of 3.5mm, with 1.2mm from the upper edge of the sapphire up to the biggest outer diameter.

Do you have tips on how to approach to design something like this?

Thanks and best regards,

Patrick

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/a/9/a97db61d96fad6d2a0c0ee3782cc12d58516ba64.png)

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [November 28, 2025, 6:24am UTC](https://discourse.shapr3d.com/t/oval-gem-design/39850/2 "2025-11-28T06:24:42Z")

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[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/b/3/b3060d3adbd014c02a46aa412b1e7116de048248.jpeg "How to Create and Sell 3D Gemstone Models Online") ](https://www.youtube.com/watch?v=L3O_tjAPkEY)

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<div class="post-metadata">

**Author:** ![pali](https://avatars.discourse-cdn.com/v4/letter/p/5f8ce5/32.png) [@pali](https://discourse.shapr3d.com/u/pali)\
**Post date:** [November 28, 2025, 11:53am UTC](https://discourse.shapr3d.com/t/oval-gem-design/39850/3 "2025-11-28T11:53:57Z")

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That only goes for round gems, not ovals

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<div class="post-metadata">

**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [November 28, 2025, 6:08pm UTC](https://discourse.shapr3d.com/t/oval-gem-design/39850/4 "2025-11-28T18:08:02Z")

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I would start here. [https://www.youtube.com/watch?v=GGQDL5LfqqU](https://www.youtube.com/watch?v=GGQDL5LfqqU)

Index gear of 96… 360 divided by 96 gives 3.75 degrees… So each number of index is a multiple of 3.75?

Use construction planes and the move tool to rotate into them into position and then use the cut tool to cut away from let’s say an extruded oval as your gem material?

Tedious but doable.

Try plugging in this number into the Gem cut program pc02187.asc (Golden Ruby Oval)?

If i didn’t have other things to do I would try it.