Zhongnan Diamond Co., Ltd.

Zhongnan Diamond is a China-based industrial synthetic diamond manufacturing colossus, headquartered in Nanyang, Henan Province. Founded in 2004 and operating as a wholly-owned subsidiary of Shenzhen-listed Zhongbing Red Arrow (000519), the company commands the world's largest HPHT press cluster with over 2,500 employees and segment revenues of RMB 16.15 billion (~$2.2B) in 2025.

Business Overview

Zhongnan Diamond has established itself as the undisputed global leader in synthetic diamond production volume, controlling an estimated 60-70% of global lab-grown diamond rough output alongside its Henan Province industrial cluster partners. The company's massive Nanyang manufacturing base, covering 2.42 million square meters, houses the world's densest concentration of six-anvil cubic presses running HPHT synthesis cycles around the clock. Its production costs run 20-40% below the international industry average, creating an almost insurmountable cost advantage that has reshaped global supply chains.

The company's scale economics and mature HPHT technology heritage — inherited from decades of Chinese industrial diamond manufacturing — make it the essential upstream supplier for the world's diamond polishing centers in India and beyond. In November 2025, Zhongnan Diamond was re-certified as a National High-Tech Enterprise by Henan Province, securing a preferential 15% corporate income tax rate that further cements its cost leadership position in an industry experiencing brutal price compression.

Key Strengths

• Unmatched production scale — controls approximately 60-70% of global lab-grown diamond rough output through its HPHT press cluster
• 20-40% cost advantage over international competitors due to China's manufacturing ecosystem and scale economics
• Preferential 15% tax rate as a certified National High-Tech Enterprise, extending cost leadership
• Complete vertical integration from graphite raw material processing through finished crystal production
• Backed by the balance sheet and military-industrial heritage of parent company Zhongbing Red Arrow

Challenges & Outlook

The company faces headwinds from the global lab-grown diamond price collapse (down ~35% since 2022), which is compressing margins across the industry. Additionally, growing market concerns about HPHT technology's limitations in achieving the ultra-high purity levels demanded by semiconductor and quantum applications are shifting investment flows toward CVD-capable manufacturing clusters in India. The company's strategic challenge is to transition from pure volume leadership toward higher-value industrial diamond applications while maintaining its cost advantage.

VerityRank Score

VerityRank Score of 89/100