<p>Sapphires and ruby's are both aluminium oxide. sapphire melts at 2000 degrees and diamond synthesis can happen at 600 degrees. To coat around the sapphire, you would have to use multiple diamond seeds, which would make a polycrystal. it's probably humanly acheivable. </p>

<p>The scientists would have to study the adhesion of a transition layer, because the sapphire is trigonal, and makes 6 sided crystals, whereas the diamond is cubic. </p>

<p><a href="https://i.sstatic.net/uXYRN.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/uXYRN.jpg" alt="enter image description here"></a></p>

<p>They do use vapor deposition already to dope crystals with very colorful metals, for example you can build a home kit for titanium quartz. </p>

<p>Perhaps if they used some kind of force to grow the diamond in a given direction, like a carbon-cannon in the vapor chamber, they can control the diamond and have one structure around the other mineral. </p>

CC BY-SA 4.0
2018-10-22T13:49:13.737Z
You might consider adding to your answer that sapphire is trigonal, so not really the same as growing diamond on diamond (cubic) or cubic zirconia (cubic again).
uhoh
CC BY-SA 4.0
2018-10-23T05:05:17.237Z
Oh yes. I added an illustration of diamond and sapphire habits.
bandybabboon
CC BY-SA 4.0
2018-10-22T07:28:07.280Z
2018-10-23T05:03:54.887Z
2018-10-23T05:03:54.887Z
bandybabboon
<p>I've been looking into diamonds recently and was made aware of diamond hybrids where diamond is grown on either a seed diamond or cubic zirconia. I was wondering if it would be possible to do something similar with sapphire. Sapphire core surrounded by diamond might be pretty cool...</p>

<geochemistry><diamond>
Is it possible to form a diamond-sapphire hybrid?
Trevor Spears
# Is it possible to form a diamond-sapphire hybrid?

(Asked by: username_0 on 2018-10-22)

I've been looking into diamonds recently and was made aware of diamond hybrids where diamond is grown on either a seed diamond or cubic zirconia. I was wondering if it would be possible to do something similar with sapphire. Sapphire core surrounded by diamond might be pretty cool...

**Tags:** geochemistry, diamond


---

## 1 answers

### Answer by username_1 on 2018-10-22. Score: 4

Sapphires and ruby's are both aluminium oxide. sapphire melts at 2000 degrees and diamond synthesis can happen at 600 degrees. To coat around the sapphire, you would have to use multiple diamond seeds, which would make a polycrystal. it's probably humanly acheivable.

The scientists would have to study the adhesion of a transition layer, because the sapphire is trigonal, and makes 6 sided crystals, whereas the diamond is cubic.

[![enter image description here](https://i.sstatic.net/uXYRN.jpg)](https://i.sstatic.net/uXYRN.jpg)

They do use vapor deposition already to dope crystals with very colorful metals, for example you can build a home kit for titanium quartz.

Perhaps if they used some kind of force to grow the diamond in a given direction, like a carbon-cannon in the vapor chamber, they can control the diamond and have one structure around the other mineral.

> **Comments:**
> **username_2**: You might consider adding to your answer that sapphire is trigonal, so not really the same as growing diamond on diamond (cubic) or cubic zirconia (cubic again).  
> **username_1**: Oh yes. I added an illustration of diamond and sapphire habits.  

---

