Chrysoprase is the green chalcedony that serious collectors quietly hoard. It has a soft, translucent, almost waxy apple green that reads as expensive under any light. It was Catherine the Great's favorite stone, and Victorian jewelers cut it into everything from brooches to cufflinks. Today it is still the most coveted of all green cryptocrystalline quartz — and one of the most often faked.
What makes it green
Chrysoprase is a variety of chalcedony, which itself is microcrystalline quartz. Its color comes from tiny inclusions of nickel-bearing minerals dispersed through the silica. Unlike emerald, whose color is caused by chromium, chrysoprase's green is a lighter, more yellow-leaning shade. The best material is described as "apple green" — saturated but not neon.
The primary source today is Marlborough in Queensland, Australia. Older material came from Silesia in Poland, which is why you see chrysoprase on so many antique Viennese pieces. Smaller deposits exist in Tanzania, Brazil, and California.
How to judge a piece
Color uniformity is the single biggest value factor. Run-of-the-mill chrysoprase is blotchy, with patches of white or gray chalcedony showing through. Top material is evenly colored across the whole cab. Translucency is next: hold the stone up to a light and look for a gentle glow through the dome. Fully opaque material is cheaper, more opaque-looking, and usually dyed agate sold as chrysoprase in tourist markets.
Dye is the main imitation. Agate dyed a similar apple green is common online. The giveaway is usually too-perfect color saturation, a slightly plastic look, and dye pooling into surface cracks. Real chrysoprase looks and feels slightly waxy, never glossy-plastic.
Durability at the bench
At 6.5 to 7 on the Mohs scale, chrysoprase is durable enough for almost any jewelry application. We set it as ring centers, bangles, cufflinks, and bolo ties. It takes a high polish, does not cleave, and tolerates ultrasonic cleaning well (though we still prefer warm soapy water on anything we set). Because it is microcrystalline, it is less brittle than a single-crystal stone like emerald, which makes it a forgiving choice for first-time colored-stone buyers.
One real caveat: light stability
Here is the detail most sellers skip. Chrysoprase color is somewhat light-sensitive. Long exposure to strong sunlight can slowly fade the green toward a paler, yellowish tone over decades. We are not talking about a summer on the windowsill ruining a piece. We are talking about a necklace hung in a bright window for twenty years. For normal wear, this is a non-issue. For heirloom pieces that will be displayed, store them in a closed box. If you have a vintage chrysoprase brooch that has paled, that is almost certainly the cause.
History on the bench
Chrysoprase has a long pedigree. It was engraved by the Greeks and Romans, mined heavily in Silesia during the Renaissance, and became a favorite of Austrian and Russian courts in the eighteenth century. Victorian jewelers set it into mourning pieces because the soft green read as quiet rather than cheerful. When you see an antique chrysoprase brooch at auction, you are usually looking at Silesian material, which tends to be slightly more yellow than modern Australian stone. The two are easy to tell apart once you have seen both.
Caring for chrysoprase
Warm soapy water and a soft brush. Ultrasonics are safe on untreated, well-cut material, but we avoid them on older pieces where we are not sure of the treatment history. Steam is not recommended. Keep it away from hydrofluoric-based cleaners and from prolonged chemical exposure. Our guide to household chemicals and jewelry has the short list of products to keep off your stones. Store chrysoprase away from harder gems to avoid surface scratches, though at 7 it holds up better than most.
How to wear chrysoprase
Chrysoprase takes well to carved details, which is why you see it in Art Deco clips and Victorian pendants. Modern designers use it as a wide cuff stone, where its translucency shows best under grazing light. We have set chrysoprase cabs in heavy 14k yellow gold signets, as bezel-set studs in platinum, and as a single oversized oval on a ball chain. It pairs surprisingly well with brown diamonds or cognac quartz, where the green plays against the warm brown instead of competing with it.
Why we set it
Chrysoprase is the green that does not fight with anything. It sits well with yellow gold, rose gold, and platinum. It looks expensive at a fraction of an emerald's price, and it is durable enough to hand down without micro-fractures developing. We keep a handful of calibrated chrysoprase cabs in the shop for custom work, and we source larger freeforms for statement pendants. If you want green that feels calm, chrysoprase is the answer.
For the legal text behind our material compliance, see the REACH Regulation (EC) No 1907/2006 on EUR-Lex.
Frequently Asked Questions
How do I verify a factory before placing a bulk order?
Request a production video, business license, export records and a paid sample run. A factory that accepts a 50-piece test order is usually a real manufacturer.
What payment terms do you offer?
30% T/T deposit with the balance against the bill of lading. This protects both sides on first orders and can move to net terms after a track record.
What is your normal reject rate?
3–5% under 10x loupe inspection for cast and set pieces. Defective units are replaced free in the next shipment.
Where is the factory located?
Wuzhou, Guangxi, China—the core lab-grown and moissanite manufacturing cluster. Shipments go via Guangzhou or Shenzhen ports.
