HPHT Lab-Grown Rough Diamonds

SinoDiam HPHT Lab-Grown Rough Diamonds are synthetic diamond crystals produced using High Pressure High Temperature (HPHT) technology for jewelry cutting, faceting and gemstone manufacturing.

Our lab-grown diamond range consists of uncut rough crystals intended for further processing by professional diamond cutters, jewelry manufacturers and wholesale gemstone suppliers. These products are supplied as rough diamond materials, not finished polished diamonds or mounted gemstones.

The series includes two principal product options: **SI1–SI2 Grade B HPHT Lab-Grown Rough Diamond** and **VS–VVS Grade A HPHT Lab-Grown Rough Diamond**.

**Grade B (SI1–SI2)** is positioned for commercial jewelry cutting, batch faceting and manufacturers seeking a balance between material quality and processing cost.

**Grade A (VS–VVS)** is positioned for higher-clarity rough diamond requirements, premium jewelry manufacturing and precision gemstone cutting applications.

These grade descriptions represent the product series designations. Actual color, clarity characteristics, crystal morphology, carat weight and potential polished yield should be evaluated and confirmed for individual rough stones or production lots.

Selecting suitable HPHT rough diamonds depends on crystal size, shape, inclusions, color appearance, intended cutting design, expected polishing yield and the requirements of the finished gemstone.

Explore the individual SinoDiam HPHT rough diamond products below to compare their characteristics and intended applications. Contact SinoDiam to discuss available specifications, rough stone requirements, order quantities and your jewelry manufacturing needs.