1st - Gold 
January 
February 
March 
April 
May 
June 
July 
August 
September 
October 
November 
December 
Capricorn - Garnet 
Aquarius - Amethyst 
Pisces - Aquamarine 
Aries - Diamond 
Taurus - Emerald 
Gemini - Pearl 
Cancer - Ruby 
Leo - Peridot 
Virgo - Blue Sapphire 
Libra - Opal 
Scorpio - Topaz 
Sagittarius - Tanzanite 
Moonstone vs Opal
Which Light Gemstone Should You Choose?
When selecting a luminous white gemstone, Moonstone and Opal are two of the most enchanting options. Both display unique light effects, but their composition, hardness, value, and care requirements differ significantly.
This complete Moonstone vs Opal comparison guide will help you understand the differences and choose the gemstone that best suits your jewellery or collection.
Moonstone vs Opal: Quick Comparison
| Feature | Moonstone | Opal |
|---|---|---|
| Mineral Family | Feldspar | Silica (Hydrated SiO2) |
| Hardness | 6 – 6.5, moderate wear | 5.5 – 6.5, softer, delicate |
| Value | Moderate; affordable luxury | Moderate to high; precious opals more valuable |
| Best For | Moonstone jewellery, light gemstone collections, pendants | Opal jewellery, statement rings, iridescent displays |
| Professional Guides | Moonstone Buyer’s Guide | Opal Buyer’s Guide |
Moonstone Features, Colour & Jewellery Uses
Moonstone is prized for its soft, ethereal shimmer called adularescence. Colours range from milky white to bluish tones, and the gem has a gentle glow that seems to float beneath the surface.
Origins & History:
Moonstones are found in Sri Lanka, India, Madagascar, and Australia. Historically, they were believed to bring protection, intuition, and calm energy.
Price Guide (per carat):
R800 – R15,000 depending on colour, clarity, and size.
Opal Features, Colour & Value Explained
Opal displays an iridescent play-of-colour that can show reds, blues, greens, and yellows in a single gem. Precious white opals are particularly sought after for their light-catching brilliance.
Origins & History:
Opals are primarily sourced from Australia, Ethiopia, and Brazil. They have long been celebrated for mystical and decorative qualities. Fine-quality opals can command significant prices.
Price Guide (per carat):
R1,500 – R50,000+ depending on colour, brightness, and pattern.
Moonstone vs Opal: Detailed Technical Comparison
| Feature | Moonstone | Opal |
|---|---|---|
| Chemical Composition | Potassium aluminium silicate (KAlSi3O8) | Hydrated silica (SiO2·nH2O) |
| Colour | Milky white, bluish-white, peach, cream | White, light blue, pinkish-white, iridescent flashes |
| Hardness (Mohs) | 6 – 6.5, moderate durability | 5.5 – 6.5, soft, delicate |
| Refractive Index | 1.520 – 1.525 | 1.37 – 1.52 |
| Specific Gravity | 2.55 – 2.63 | 1.98 – 2.25 |
| Clarity & Inclusions | Generally translucent; shimmer effect enhanced by layering | Can be transparent to translucent; inclusions called “matrix” common |
| Origin | Sri Lanka, India, Madagascar, Australia | Australia, Ethiopia, Brazil |
| Treatment | Rarely treated; some heating or coating to enhance shimmer | Usually untreated; sometimes stabilised with resin for jewellery |
| Best Use | Moonstone jewellery, light gemstone collections, pendants | Opal jewellery, statement rings, iridescent displays |
Moonstone vs Opal: Colour, Hardness & Care Tips
Colour & Light Effects:
- Moonstone: Soft adularescence; white or bluish glow.
- Opal: Iridescent play-of-colour; flashes of rainbow hues.
Hardness & Durability:
- Moonstone: Mohs 6 – 6.5; moderate care for rings.
- Opal: Mohs 5.5 – 6.5; delicate; avoid knocks and prolonged water exposure.
Care Tips:
- Moonstone: Clean with mild soap; store separately.
- Opal: Avoid chemical exposure, extreme heat, and strong impacts.
Moonstone vs Opal: How to Tell Them Apart
💡 Tip: Check play-of-colour versus shimmer. Moonstone has soft adularescence, while opal displays multi-coloured flashes.
Moonstone Summary
- Hardness: Mohs 6 – 6.5
- Colour: White, blue, peach
- Refractive Index: 1.520 – 1.525
- Inclusions: Layering enhances shimmer
- Care: Moderate; avoid harsh chemicals
Opal Summary
- Hardness: Mohs 5.5 – 6.5
- Colour: White to rainbow flashes
- Refractive Index: 1.37 – 1.52
- Inclusions: Matrix patterns common
- Care: Very delicate; protect from impact and heat
Buying Tips
- Ensure certification for valuable opals.
- Check adularescence for moonstones; inspect for cracks in opals.
- Stable settings recommended for opals; moonstones are less fragile but still benefit from protection.
- Browse our Moonstone Collection and Opal Collection.
Which Should You Choose?
- Moonstone: For soft shimmer, affordable luxury, and light gemstone jewellery.
- Opal: For iridescent brilliance, statement pieces, and higher-value collections.
Both offer unique beauty; understanding durability, light effects, and care ensures the best purchase.
Moonstone vs Opal FAQ’s
Can opal and moonstone be confused?
Yes, both are light gemstones; colour and light effects help differentiate.
Which is more durable?
Moonstone is slightly harder than opal.
Are opals suitable for daily rings?
Only with careful protective settings; avoid knocks.
Can moonstone jewellery be worn every day?
Yes, but avoid rough impacts.
Are opals treated?
Sometimes stabilised; most natural opals are untreated.
Which gemstone is better for gifts?
Both; moonstone is affordable and subtle, opal is vibrant and dramatic.
COMPARE GEMSTONES WITH CONFIDENCE
Gemstone Comparison Guides
Choosing between two beautiful gemstones can be challenging. Our professional Gemstone Comparison Guides help you clearly understand the differences between popular gemstones so you can make a confident and informed choice.
Each comparison explores the key factors that influence gemstone quality and value, including colour, clarity, durability, rarity and typical treatments. You will also learn how similar-looking gemstones differ in appearance, composition, hardness and more.
HERE IS ALL THE PROFESSIONAL INFORMATION YOU NEED
Gemstone Buyer's Guides
Buying a gemstone should be exciting — but understanding quality, rarity and value is essential before making the right choice. Our professional Gemstone Buyer’s Guides help you understand how colour, clarity, cut and treatments influence the beauty and value of different gemstones.
Each guide explains the key quality factors used by gemologists, including gemstone composition, colour grading, natural inclusions, treatments and origin. You will also learn how these factors affect rarity, durability and market value.
Beryl Family
Feldspar Gemstones
Pyroxene Gemstones
Spodumene Family
Chalcedony & Agate
Quartz Gemstones
Amethyst
Ametrine
Citrine
Prasiolite
Quartz
Rose Quartz
Rutile Quartz
Smoky Quartz
Rare & Collector Gemstones
Apatite
Chrysoberyl
Clinozoisite
Fluorite
Grandidierite
Iolite
Jade
Kyanite
Lapis Lazuli
Phosphosiderite
Prehnite
Serendibite
Sillimanite
Sphene
Sugilite
Vesuvianite