Aquamarine is a pale blue to blue-green variety of beryl, the same mineral family that includes emerald and morganite, composed of beryllium aluminum cyclosilicate with iron impurities that create its distinctive ocean-like coloration. This beloved gemstone has been treasured since ancient times for its crystal-clear transparency and serene blue hues that evoke the calm waters of tropical seas, making it one of the most popular and recognizable gemstones in fine jewelry. Aquamarine typically forms in large, well-formed crystals with exceptional clarity, allowing for the creation of sizable gemstones that showcase the stone's natural beauty and brilliant sparkle.
- Color range: Pale sky blue to deep ocean blue-green; finest specimens show pure blue without green undertones, though blue-green varieties are also highly valued
- Sizes: Available from small accent stones (3-5mm) to very large specimens (100+ carats); larger stones often display richer, more saturated color
- Shapes: Excellent for all cuts including emerald, oval, round, cushion, and pear; step cuts showcase clarity while brilliant cuts maximize sparkle
- Origin: Primarily Brazil, Madagascar, Nigeria, Pakistan, and Afghanistan; Brazilian material often produces the finest blue colors
- Hardness: 7.5 to 8 on Mohs scale, excellent durability for all jewelry applications including daily wear rings and bracelets
- Clarity: Typically very clean with exceptional transparency; inclusions are rare in gem-quality material, contributing to high brilliance
- Pleochroism: Weak pleochroism showing slightly different blue intensities from various viewing angles
- Heat treatment: Often heated to remove yellow tints and enhance pure blue coloration; this treatment is permanent and widely accepted
