What’s the Difference Between Grades of Diamondium？

Diamondium is JCVAP’s internal grading system for moissanite (silicon carbide, SiC) materials used in high-temperature accessories such as terp pearls, terp pillars, and other heat-retention components.

Although all Diamondium is based on silicon carbide, different grades show clear differences in purity, crystal structure, defect density, and thermal performance. These differences directly affect heat transfer efficiency, stability, and long-term durability.

This guide explains how Diamondium Grades A, B, C, and D differ, and how those differences translate into real-world performance.

What Determines a Diamondium Grade?

Diamondium grades are classified based on material quality, not size or shape.

Key factors include:

• Crystal purity and uniformity

• Internal defects and inclusions

• Impurity concentration and color centers

• Structural density

• Thermal conductivity and heat stability

Higher-grade Diamondium materials feature fewer defects and a more continuous crystal structure, allowing heat to transfer more efficiently and evenly.

Grade A Diamondium (Highest Grade)

Grade A Diamondium represents the highest purity level within the JCVAP grading system.

Material Characteristics

• Fully transparent and crystal-clear appearance

• Extremely low defect and impurity levels

• Highly uniform single-crystal structure

Thermal Performance

• Excellent heat transfer efficiency

• Fast and even heat distribution

• Estimated thermal conductivity range: ~380–500+ W/m·K

Recommended Use

• Premium terp pearls and terp pillars

• Daily use and high-temperature sessions

• Users seeking maximum consistency and thermal efficiency

Grade B Diamondium (Colored Single Crystal)

Grade B Diamondium contains controlled impurities or color centers, typically appearing green or champagne in color.

Material Characteristics

• Visible coloration caused by trace impurities

• Slightly higher defect density than Grade A

• Maintains a single-crystal structure

Thermal Performance

• Strong and reliable heat transfer

• Slightly more variance compared to Grade A

• Estimated thermal conductivity range: ~300–420 W/m·K

Recommended Use

• Performance-focused users

• Users who want both strong thermal behavior and unique aesthetics

Grade C Diamondium (Not Offered)

Grade C Diamondium is not currently offered by JCVAP.

This grade would typically fall between Grade B and Grade D in terms of purity and consistency, but it does not meet JCVAP’s standards for performance stability or material control.

Grade D Diamondium (Mechanical Grade)

Grade D Diamondium is classified as mechanical-grade silicon carbide. It usually appears black or dark in color and may be slightly translucent.

It is important to clarify that mechanical grade does not mean low performance.

Material Characteristics

• High structural density

• Higher defect concentration than A or B

• Dark or black appearance

Thermal Performance

• Significantly higher thermal conductivity than common industrial SiC ceramics

• Maintains efficient heat transfer despite increased defects

• Estimated thermal conductivity range: ~200–280+ W/m·K

Recommended Use

• Reliable functional setups

• Cost-efficient configurations

• Users prioritizing durability and value over optical clarity

Diamondium Grade Comparison Table

How Diamondium Grades Affect Real-World Performance

Heat Response
Higher-grade Diamondium heats faster and distributes energy more evenly across the surface.

Temperature Stability
Lower defect density reduces hot spots and minimizes temperature fluctuation during repeated heat cycles.

Longevity
Premium grades resist clouding, micro-fractures, and surface degradation, maintaining consistent performance over time.

Final Thoughts on Diamondium Grades

Diamondium grading is functional rather than cosmetic.

Even Grade D Diamondium remains a high-performance silicon carbide material, while Grade A and Grade B deliver the highest level of thermal efficiency, stability, and consistency.

Understanding these differences helps users choose the right balance between performance, aesthetics, and cost.