Polaris Huajing Gem

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29

2025-09

Core Properties and Application Areas of Synthetic Corundum

The advantages of synthetic corundum stem from its stable crystal structure and controllable manufacturing process, with its core characteristics summarized as “hard, stable, pure, and customizable”: Exceptional hardness: With a Mohs hardness of 9, it ranks just below diamond (10), exhibiting excellent wear resistance and scratch resistance, and can withstand friction from hard materials such as metals and ceramics.

2025-09-29

Core Properties and Application Areas of Synthetic Corundum

01

2025-09

Market Position and Trends of Spinel

In recent years, as the prices of natural rubies and sapphires have continued to rise, natural spinels—known for their striking appearance, excellent hardness, and relatively affordable pricing—have gradually become a favorite in the jewelry market. In particular, premium varieties such as “Jedi Knight” and Mahenge, prized for their distinctive hues and limited availability, have seen annual price increases of 10% to 20%, making them a popular choice among collectors of niche gemstones.

2025-09-01

Market Position and Trends of Spinel

20

2018-03

Scientists have unexpectedly created a glow-in-the-dark gemstone whose hardness even surpasses that of diamond.

Scientists have discovered a new carbon-based material that can form diamond-like crystals and surpass diamonds in both hardness and yield. This novel synthetic gemstone is magnetic and can emit a glow in the dark. The crystal was identified by a research team at the University of North Carolina, who have named the new material “Q-carbon.” The researchers stumbled upon it while testing a rapid method for producing synthetic diamonds. During the experiment, they directed laser pulses at a piece of ancient carbon, heating it until it melted into a gel-like substance. As this liquid cooled rapidly,

2018-03-20

Scientists have unexpectedly created a glow-in-the-dark gemstone whose hardness even surpasses that of diamond.

20

2018-03

GGII: Table of Contents for the 2017–2018 LED Sapphire Report

Sapphire, as the most critical substrate material for LED chips, currently accounts for over 95% of the LED‑chip substrate market. As China’s LED industry rapidly expands and extends along a bottom-up value chain, related international supply chains are swiftly shifting to mainland China.

2018-03-20

GGII: Table of Contents for the 2017–2018 LED Sapphire Report

20

2018-03

The world’s largest synthetic sapphire crystal has been produced in China.

According to a report by Science and Technology Daily, the Hohhot Municipal Party Committee’s Publicity Department in Saihan District announced on the 13th that the world’s largest 450‑kilogram‑class ultra‑large‑size, high‑quality sapphire crystal grown by the Kyocera method has been successfully produced at the production workshop of Inner Mongolia Jinghuan Electronic Materials Co., Ltd. This crystal was independently developed by Jinghuan Electronics’ R&D team and, after nearly eight months of design and development, equipment fabrication, annealing, and crystal growth, achieved successful small‑scale trial production on the 13th. Preliminary testing indicates that the crystal weighs 445 kilograms, exhibits a regular shape, is uniformly transparent, free of cracks and grain boundaries, contains few bubbles, and can be used for LED applications, with an effective length of 4‑inch ingots exceeding 4,550 millimeters. The Kyocera method is…

2018-03-20

The world’s largest synthetic sapphire crystal has been produced in China.
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