How HPHT Diamonds Are Made: The Science Behind High-Pressure High-Temperature

  • By Together Diamonds

Published: Thursday, August 21, 2025

Diamonds form deep in the Earth under unimaginable heat and pressure. The High-Pressure High-Temperature (HPHT) method recreates these natural conditions in a lab, allowing us to grow diamonds above ground with precision and care.

At Together Diamonds, we take this a step further by using carbon extracted from the hair, fur, or ashes you provide. This carbon is carefully purified and combined with pure carbon to ensure both structural integrity and brilliance of the final diamond.

The result is a diamond that is scientifically flawless yet emotionally priceless—carrying a real part of your loved ones, preserved forever.

The HPHT Process at Together Diamonds

Carbon Extraction – We purify and extract carbon from the hair, fur, or ashes you provide.

Blending for Perfection – This carbon is combined with high-purity carbon to ensure that your diamond grows strong, stable, and of excellent quality.

Diamond Formation – The carbon is placed into a growth chamber, subjected to over 1,500°C of heat and pressures above 5–6 GPa (60,000 times atmospheric pressure). Under these conditions, the atoms rearrange into a crystal lattice—the very structure of a diamond.

Cutting & Polishing – The rough diamond is cut and polished by master craftsmen, bringing out its unique fire and brilliance.

Why This Is Special

✨ Carries Real Essence – Every diamond contains carbon from your loved one’s hair, fur, or ashes.
✨ Guaranteed Quality – By blending with pure carbon, we ensure durability, clarity, and brilliance—something not all labs can guarantee.
✨ Process Transparency – We are the only ones who video the entire process, so you always have proof that your diamond is truly yours.

Final Thoughts

Your Together Diamond is not just a stone—it’s a story. By combining the carbon of your loved ones with the precision of modern science, we create a diamond that is both eternal and deeply personal.