Buying Sapphire: What You Need to Know Before You Invest
Buying a sapphire is a significant decision – this gemstone can cost thousands to hundreds of thousands of Euros, depending on its quality. To help you avoid expensive mistakes, this guide explains everything you need to know before buying a sapphire.
Sapphire Basics: What You Should See
Sapphire is corundum (aluminum oxide) in all colors except red (which is ruby). The classic sapphire is blue – due to iron and titanium impurities. The GIA (Gemological Institute of America) is the most important certification body for sapphires – a GIA certificate is mandatory when purchasing valuable pieces.
Color: The Most Important Criterion
With sapphires, color is more important than anything else. The three dimensions of color:
- Hue: Pure blue is the most valuable. Slightly violet-blue (Royal Blue) is considered premium. Too greenish or too gray: inferior quality.
- Saturation: Vivid is optimal. Too pale or too dark (almost black) reduces value.
- Tone: Medium to medium-dark is the sweet spot. Very light sapphire appears colorless; very dark loses its blue in artificial light.
The three most important origins and their typical colors:
- Kashmir (India): Velvety, slightly milky-blue – the best and most expensive. Barely available anymore.
- Burma (Myanmar): Vivid, pure blue with strong fluorescence – highly sought after.
- Sri Lanka (Ceylon): Lighter, cornflower-blue – more common and affordable.
Clarity: Inclusions Are Normal
Sapphires are evaluated differently from diamonds – inclusions are expected and accepted in sapphires, as long as they don't significantly disrupt the play of light. "Eye clean" (no visible inclusions to the naked eye) is the standard for good jewelry-grade sapphires. Loupe-clean sapphires are exceptionally rare and very expensive.
Treatments: What Almost Every Sapphire Has
Over 90% of all sapphires on the market are heat-treated – this improves color and clarity. This is an industry standard and accepted. What must be communicated transparently during purchase:
- Untreated (Unheated): Rare, significantly more expensive – certified by GIA or AGL
- Heat-treated: Standard, no flaw – must be communicated
- Beryllium-treated: Greatly intensifies color – significantly cheaper, must be disclosed
- Filling (Glass filling): Cracks filled with glass – drastically inferior, little value
What a Good Sapphire Should Cost
- 0.5 ct, good quality, heat-treated: 200–800 €
- 1 ct, fine quality, heat-treated: 800–3,000 €
- 1 ct, Kashmir/Burma, untreated: 5,000–50,000 €+
Sapphire-Inspired Jewelry at Corelune Jewellery
For the feel of sapphire at an accessible price – at Corelune Jewellery, you'll find pieces featuring the king of all blue stones.
