since 1989
All genuine Optima Gem products come with our certificate of quality and authenticity upon request.
Optima Gem is a US based small business that has provided honest, accurately graded gemstones for over 30 years. Satisfaction Guaranteed.
Optima Gem is a US based small business that has provided honest, accurately graded gemstones for over 30 years. Satisfaction Guaranteed.
We are an Equal Opportunity Employer that promotes fair ethical business practices worldwide from the gem mine to your door.
Our gems are calibrated for easy design for the artist and use in standard settings by the jeweler, goldsmith or silversmith.
Need more quantity? Just ask. We limit availability to prevent being oversold. We offer volume discounts and free matching.
Need more quantity? Just ask. We limit availability to prevent being oversold. We offer volume discounts and free matching.
We offer the following shipping options. Economy (usually FREE), First Class (Standard Rate), Priority (Standard Rate + $5), UPS 2-day (Standard Rate + $20 US48), UPS 1-day (Standard Rate + $30 US48). If the option you want is not displayed (eBay decides), message us before you order for solution.
Detailed Product Description:
Gem Species: CORUNDUM Hardness: 9 Density: 3.95 RI: 1.76
Keep in mind that you are seeing much more in the photo than you can see with the naked eye, most times over 20x magnification. Dust, fingerprints and flash reflections are exaggerated in photographs. Smaller sizes will have progressively less color saturation than photo. If you are concerned about anything you see in our photos, contact us for more detail.
We
carefully select the rough to represent accurately its natural
counterpart. The clean gems are created by the Flame Fusion whereas the included (AA quality) gems are grown in crystals by the Flux method. Both have
essentially the same physical properties as natural Ruby.
Fine Cut = Precision cut or visually imitates a precision cut. These stones have equal and symmetrical faceting with proper cutting angles ("critical angle') and depth. Depth is between 60% and 70% of size listed. Size can vary +-0.1mm. 2-3mm (millimeter) gems are very small - less than 1/8 inch.
AAA = eye clean, any inclusions will not be visible to the eye.
Fine Cut = Precision cut or visually imitates a precision cut. These stones have equal and symmetrical faceting with proper cutting angles ("critical angle') and depth. Depth is between 60% and 70% of size listed. Size can vary +-0.1mm. 2-3mm (millimeter) gems are very small - less than 1/8 inch.
AAA = eye clean, any inclusions will not be visible to the eye.
AA = visible inclusions difficult to see face up
Keep in mind that you are seeing much more in the photo than you can see with the naked eye, most times over 20x magnification. Dust, fingerprints and flash reflections are exaggerated in photographs. Smaller sizes will have progressively less color saturation than photo. If you are concerned about anything you see in our photos, contact us for more detail.