HPHT RAW MATERIAL
High-Purity Lab-Grown Diamonds
HPHT (High Pressure High Temperature) is a leading method for growing lab-grown diamonds with outstanding optical and chemical purity. Under extreme pressure and heat, carbon sources like graphite crystallize into gem-quality stones used in fine jewelry, cutting tools, and precision optics.
HPHT Raw Material Price List
| Weight (ct) | Grade | Clarity | Approx. Size | Price (USD/ct) |
|---|---|---|---|---|
| 0.6–0.8 | 1A | VVS–SI1 | 4.0–5.0 mm | 25 |
| 0.8–1.0 | 1A | VVS–SI1 | 4.5–5.5 mm | 25 |
| 1.0–1.5 | 1A | VVS–SI1 | 5.0–6.0 mm | 25 |
| 1.5–2.0 | 1A | VVS–SI1 | 5.5–6.5 mm | 25 |
| 2.0–2.5 | 1A | VVS–SI1 | 6.5–7.5 mm | 25 |
| 2.5–3.0 | 1A | VVS–SI1 | 7.0–8.0 mm | 30 |
| 3.0–4.0 | 1A | VVS–SI1 | 7.0–8.5 mm | 35 |
| 4.0–5.0 | 1A | VVS–SI1 | 7.5–9.0 mm | 40 |
| 5.0–6.0 | 1A | VVS–SI1 | 8.5–10.0 mm | 65 |
| 6.0–7.0 | 1A | VVS–SI1 | 9.0–10.5 mm | 65 |
| 7.0–8.0 | 1A | VVS–SI1 | 9.0–11.0 mm | 70 |
| 8.0+ | 1A | VVS–SI1 | >9.0 mm | 75 |
WHY HPHT
Key Advantages
Clean lots, steady specs, and pricing that works for day-to-day production.
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Clean, bright rough
Strong light return with tight control on color and clarity across batches.
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Grown to spec
Hit your target size and grade—less waste, better yield for your designs.
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Fair $/ct
Pricing that scales well for bulk orders and everyday stocking.
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Stable & responsible
Lab-grown supply with low mining impact and predictable lead times.