Opals are famous for their shifting flashes of blue, green, orange, and red — a phenomenon that makes them one of the most mesmerizing gemstones in jewelry. But today, opals aren’t just mined from the earth; they can also be created in a laboratory.
This raises an important question: how do lab created opals compare to natural opals? Are they the same, or are there key differences you should know before choosing one for your jewelry?
At Goldsmith Jewelers, we’re here to give you a clear, side-by-side understanding of natural and lab created opals — so you can see what sets them apart and decide which is right for you.
Defining Lab Created Opal
A lab created opal is a real opal grown under controlled laboratory conditions. Unlike imitations made from glass or resin, lab opals have the same silica composition and internal structure as natural opals.
Key Insight: Lab created opals are genuine opals — just formed in a lab instead of in the earth.
How Are Lab Created Opals Made?
In nature, opals form over millions of years as water carrying silica seeps into cracks in rock, gradually solidifying into a gem. Lab created opals follow the same process but in a controlled environment.
- Timeframe: Roughly one year, compared to millions of years in nature.
- Structure: The same tiny silica spheres that bend light into rainbow flashes.
- Outcome: A vibrant, stable gemstone with fewer cracks or inconsistencies.
Natural vs. Lab Created Opals: Key Differences
Here’s where you’ll see the main distinctions. Both are opals, but their formation environments influence their appearance and behavior.
1. Formation
- Natural opals: Form underground, shaped by geology, water, and time.
- Lab created opals: Made in a lab using the same elements, but with speed and stability.
2. Color and Patterns
- Natural opals: Can display a wide variety of colors and play-of-color patterns (patches, pinfire, harlequin). Each is unique, but some stones may show muted or uneven color distribution.
- Lab created opals: Feature the same full spectrum of opal colors (blue, green, orange, pink, etc.), but patterns are usually more uniform, with brighter consistency across the stone.
The spectrum applies to both natural and lab created opals — the difference is that natural stones often show more irregular, organic patterns, while lab stones appear more evenly distributed.
3. Durability
- Natural opals: Softer (Mohs 5.5–6.5), porous, and prone to cracking or “crazing” when exposed to heat or dryness.
- Lab created opals: More stable, with fewer internal stresses, so they resist cracking better under normal wear.
4. Price and Availability
- Natural opals: Rare, especially for high-quality pieces, which drives up value.
- Lab created opals: More affordable, and availability is consistent since they can be grown on demand.
Why Choose a Lab Created Opal?
Some reasons clients love lab created opals:
- Bright, consistent color with fewer imperfections.
- Better durability for everyday jewelry.
- More affordable than rare natural opals of similar size.
- Creative freedom in custom designs thanks to consistent supply.
Jewelry Applications
Lab created opals shine in all kinds of jewelry:
- Opal engagement rings for a colorful, alternative look.
- Earrings and pendants that showcase rainbow flashes.
- Cocktail rings or cuffs with large, vibrant opals as centerpieces.
Caring for Your Opals
Both natural and lab created opals need careful handling:
- Avoid extreme heat or harsh chemicals.
- Store separately from harder gems to prevent scratches.
- Clean with mild soap, water, and a soft cloth.
Tip: Regular professional cleanings at Goldsmith Jewelers keep your opal jewelry radiant.
Custom Opal Jewelry
At Goldsmith Jewelers, our expert team can design pieces that bring out the magic of opal — whether natural or lab created. From redesigning heirlooms to crafting modern custom rings, we’ll guide you through every step with personalized service.
Conclusion: Two Ways to Shine
So, what is lab created opal? It’s a genuine opal formed in a laboratory, with the same stunning play of color and silica structure as natural opal. The main differences lie in formation, durability, availability, and the uniformity of patterns.
Both natural and lab created opals offer beauty and meaning. Whether you’re drawn to the rarity of natural gems or the stability and vibrancy of lab stones, you’re choosing a gemstone that radiates individuality.
At Goldsmith Jewelers, we welcome you to explore our opal collection in North Royalton, Ohio — natural and lab created alike — and discover the perfect piece that reflects your style.
Goldsmith Jewelers
12861 State Road, North Royalton, Ohio 44133
440.237.4500 | info@goldsmithjewelersohio.com