Ruby emits bewitching dark red light. With passion and sensuality, she has strong a personality and beauty In fact, her brightness has been highly valued since ancient times, where it is was used for amulets and sometimes even for secret medicines.
Ruby is made of alumina called corundum and it is the second hardest jewel next to diamond. The finest gemstones are bright red with a slight purplish hue and are called ″Pigeon Blood″ rubies.

The Crescent Vert Ruby is as beautiful as the finest natural rubies from Myanmar. We successfully reproduce the enchanting crimson color and high transparency of natural rubies.

Comparison of Crescent Vert and Natural Jewels

Items		Crescent Vert Ruby	Natural Ruby
Chemical Characteristics	Composition	Al2O3	Al2O3
	X-ray Diffraction	Same as Natural Jewel	Particular Patterns of Ruby
	Spectroscopic Analysis	Same as Natural Jewel	Particular Absorption of Ruby
Physical Character	Crystal System	Hexagonal Crystal System	Hexagonal Crystal System
	Mohs Hardness	9	9
	Specific Gravity	4.01	3.90～4.01
	Melting Point	2050℃	2050℃
Optical Nature	Transparency	Transparent	Transparent
	Refractive Index	1.762～1.770	1.760～1.768
	Double Refraction	0.008	0.008
	Mean Dispersion	0.018	0.018
	Polychromatic	Yellow-Red, bright Red	Pale Yellow-Red, Pale Red
	Chelsea Color Filter Examination	Strong bright Red	Strong bright Red
	Inclusions	Solid Phase	Solid Phase, Liquid Phase