Aquamarine, the blue to blue-green variety of beryl, has captivated jewelry lovers for centuries. Named for its seawater color (Latin "aqua marina" meaning "sea water"), this March birthstone offers exceptional clarity, excellent durability, and a serene color palette that complements every skin tone.
Color: From Pale Sky to Deep Sea
Aquamarine color ranges from very light blue (barely perceptible) to deep blue-green. The color is caused by iron (Fe2+) in the beryl crystal structure. The most valuable aquamarines show a pure, medium blue with no gray or green modifier — often called "Santa Maria" color after the famous Brazilian mine.
| Color Grade | Description | Price Multiplier |
|---|---|---|
| Santa Maria Blue | Deep, pure blue, strong saturation | 3-5x |
| Vivid Blue | Medium-deep pure blue | 2-3x |
| Strong Blue | Good blue, slight green modifier | 1.3-2x |
| Medium Blue | Noticeable color, decent saturation | 0.8-1.3x |
| Light Blue | Pale, delicate blue | 0.3-0.8x |
| Greenish-Blue | Noticeable green modifier | 0.4-0.9x |
Exceptional Clarity
Aquamarine is one of the cleanest gemstones in nature. Unlike emerald (also a beryl), aquamarine forms under conditions that produce very few inclusions. Large, eye-clean aquamarines of 10+ carats are relatively common and affordable compared to other gemstones. This clarity makes aquamarine ideal for large statement pieces.
Heat Treatment
Most aquamarines on the market (approximately 80-90%) have been heat-treated at 300-500°C to:
- Remove green or yellow modifiers, producing a purer blue
- Improve overall color consistency
- Reduce the visibility of certain inclusions
Heat treatment is permanent, undetectable, and universally accepted. Untreated "greenish-blue" aquamarines are available but less popular commercially. There is no price premium for untreated aquamarine because the treatment is so standard.
Major Origins
| Origin | Characteristics | Notable For |
|---|---|---|
| Brazil (Santa Maria) | Deep blue, large sizes, clean | Benchmark color |
| Brazil (Espirito Santo) | Light to medium blue, abundant | Commercial supply |
| Mozambique | Medium blue, good clarity | Growing supply |
| Nigeria | Deep blue, smaller sizes | Premium color |
| Madagascar | Light blue, clean | Affordable |
| Pakistan | Deep blue, rare | Collector stones |
| USA (Maine, Colorado) | Light blue, rare | Domestic source |
Pricing and Size Availability
Aquamarine is one of the most affordable fine gemstones, especially in larger sizes. Unlike many gems where price increases exponentially per carat, aquamarine pricing is relatively linear because large clean stones are available.
| Size | Wholesale Price (per ct) | Typical Use |
|---|---|---|
| 3-5mm (0.2-0.6ct) | $5-25 | Earrings, small pendants |
| 6-8mm (0.8-2ct) | $15-60 | Rings, pendants |
| 9-12mm (2-5ct) | $40-150 | Statement rings |
| 13-16mm (5-10ct) | $80-300 | High-end pendants |
| 17mm+ (10ct+) | $150-500+ | Collector pieces |
Durability and Care
Aquamarine rates 7.5-8 on the Mohs scale, making it durable enough for everyday jewelry including engagement rings. It has good toughness and is less prone to chipping than emerald. Clean with warm soapy water and a soft brush. Ultrasonic and steam cleaners are generally safe for untreated and heat-treated aquamarine.
Design Trends
Aquamarine is experiencing a renaissance driven by:
- Coastal aesthetic — Beach and ocean-themed jewelry remains popular
- Something blue — Bridal jewelry tradition drives demand
- Art Deco revival — Aquamarine was a favorite in Art Deco design
- Large statement pieces — Affordable large sizes appeal to bold jewelry trends
- Minimalist settings — Clean white metal settings let the color speak
Frequently Asked Questions
Is aquamarine a good engagement ring stone?
Yes. At 7.5-8 Mohs with good toughness, aquamarine is durable enough for daily wear. Its excellent clarity means large, eye-clean stones are affordable, and the blue color is both unique and timeless.
What is Santa Maria aquamarine?
Santa Maria refers to the deepest, most saturated blue aquamarine color, originally from the Santa Maria de Itabira mine in Brazil. It is the most valuable aquamarine color grade, commanding 3-5x the price of lighter material.
Are aquamarines always heat-treated?
Approximately 80-90% of commercial aquamarines are heat-treated to remove green modifiers and produce a purer blue. The treatment is permanent, undetectable, and universally accepted. There is no premium for untreated material.
How does aquamarine compare to blue topaz?
Aquamarine is rarer, more valuable, and has a more subtle, natural blue. Blue topaz is usually irradiated (a treatment) and can look artificially bright. Aquamarine also has better clarity and is more durable for fine jewelry.
For more expert gemstone and jewelry guidance, explore our knowledge base or contact our sourcing team at service@holycome.com for wholesale inquiries.