Monday's debut is one of those drops that reminds you just how broad the world of gemstones really is — from the sun-baked plains of Western Australia to the moonlit highland mines of Madagascar, every stone has a story worth telling. This week, five distinctive gemstones take center stage across SARDA's newest collections, each one chosen for its character and cut. Here's what you'll be wearing.

Mookaite — Australia's Desert Treasure

Mookaite is one of the world's most distinctly Australian gems, named after Mooka Creek in Western Australia, where it is found exclusively. This opaque stone comes in a warm palette that mirrors the Australian outback: deep ochre, burgundy, mustard, rose, and cream, all swirled together in organic patterns that make every single piece completely unique. Technically a form of radiolarite — a sedimentary rock composed of the fossilized shells of ancient marine microorganisms — Mookaite has been shaped over millions of years in the Windalia Radiolarite formation of the Kennedy Range. Indigenous Australians have long valued it as a practical material, and it remains culturally significant on the continent. Learn more at the International Gem Society.

Mookaite sits at a Mohs hardness of 6 to 7, making it reasonably solid for everyday wear. Avoid prolonged water exposure, as its natural porosity can cause the surface to lose its polish over time. Clean gently with a soft, dry cloth. This week, Mookaite appears as a striking plain fancy long cushion cabochon (20x12mm, 8.59 ctw) in the One Far Greater collection — featured in the One Far Greater Bracelet™ and Pendant™.

Labradorite — The Stone That Holds the Northern Lights

Few gemstones stop you in your tracks quite like Labradorite. Named for the Labrador Peninsula in Canada, though Madagascar — the source of our debut stones — is now a primary producer, Labradorite is a member of the feldspar family celebrated for a phenomenon unique to the mineral world: labradorescence. When light strikes the stone at an angle, it ignites a spectral shimmer — blues, greens, golds, and violets flashing from within as though an aurora is trapped beneath the surface. Inuit tradition speaks of the Northern Lights being captured inside the rocks of Labrador long ago; it's easy to understand the image. Learn more at the GIA.

For SARDA's Celeste collection debut, Labradorite appears in a particularly dramatic form: a hand-carved moon doublet (49x34mm, 76.5 ctw), assembled with black stone to create a celestial statement piece unlike anything in our previous shows. At Mohs 6 to 6.5, Labradorite is best kept away from ultrasonic cleaners and harsh chemicals; wipe with a soft damp cloth and store separately from harder stones. Shop the Celeste Pendant™ and Celeste Bracelet II™.

Sea Green Fluorite — Cool, Luminous, and One of a Kind

Fluorite earns its name from the Latin fluere, meaning "to flow" — it was historically used as a flux in metalworking — but its visual appeal stands entirely on its own. Sea Green Fluorite has a soft, watery clarity that calls to mind sunlit shallow reefs, ranging from pale celadon to a deeper jade-adjacent green. Sourced from China, it's often found in sizable crystals that allow for the generous long cushion faceted cuts SARDA favors (14x10mm, 6.63 ctw). Fluorite is also famously fluorescent — many specimens glow blue or violet under UV light, a detail that makes it a particularly fun stone to own. Read more at the International Gem Society.

The most important fact for Fluorite wearers: it measures Mohs 4, making it one of the softer gemstones in SARDA's lineup. Handle it with care, avoid contact with harder surfaces, and never use ultrasonic or steam cleaners. Sea Green Fluorite serves as the centerpiece of the Saves The Lost collection this week, appearing across the Ring™, Pendant™, and Bracelet™. The Pendant and Bracelet also feature companion stones Peridot (China, Mohs 6.5–7) and Prehnite (Namibia, Mohs 6–6.5) to round out the palette.

Smoky Quartz — Warm Shadow, Quiet Strength

Smoky Quartz is one of the most enduringly loved members of the quartz family. Its warm, smoky brown hues — ranging from pale taupe to deep tobacco — develop through irradiation of aluminum-bearing quartz, a process that produces a beautifully consistent, rich color. Our debut Smoky Quartz originates from Brazil and is shaped into a long cushion checkerboard cut (14x10mm, 5.1 ctw) that gives the stone exceptional light play and a faceted depth that reads as both classic and thoroughly contemporary. The checkerboard pattern multiplies the stone's reflections without overwhelming its natural warmth — it's a cut that works morning or evening. Learn more at GIA.

With a Mohs hardness of 7, Smoky Quartz is well-suited for everyday wear. One note: the color can fade gradually with prolonged direct sunlight, so store pieces away from windowsills when not wearing them. Clean with warm soapy water and a soft brush. Smoky Quartz anchors the Worshipping In & Thru It collection in the Ring™, Bracelet™, and Earrings™.

Olive Quartz — Earthy Glow, Beautifully Transformed

Olive Quartz is quartz given new character through a controlled irradiation process that shifts the stone's natural color toward the rich, muted tones of ripe olives — warm green with golden, earthy undertones that feel grounded rather than flashy. Originating from Brazil and shaped into a round birdnest silhouette (13mm, 6.12 ctw), it has an unusually organic appearance that sets it apart from more conventional round cuts. The birdnest technique creates a lattice of crisscrossing ridges across the surface, catching and diffusing light from every angle and giving the stone a sculptural, almost botanical quality. Read more at the International Gem Society.

At Mohs 7, Olive Quartz is solid enough for rings, pendants, and bracelets intended for daily life. Avoid harsh chemicals and store away from direct sunlight to preserve the irradiated color over time. This week, Olive Quartz appears across two collections: Give Him UR Fears (the Ring™) and Worshipping In & Thru It (the Pendant™ and Bracelet™).

Caring for This Week's Stones

This week's debut spans a wide range of gem hardnesses, so a few targeted care notes will keep each piece looking its best for years.

• Sea Green Fluorite (Mohs 4): The most delicate stone in this drop. Store in a separate soft pouch, away from all harder stones. Clean only with a dry or very lightly damp cloth — no water immersion, no ultrasonic machines, no steam.
• Labradorite, Mookaite (Mohs 6–7): Moderately durable. Use a soft damp cloth for cleaning; avoid ultrasonic cleaners and steam. Store separately from harder gems like quartz to prevent surface scratches.
• Smoky Quartz, Olive Quartz (Mohs 7): The most resilient stones in this week's debut. Warm soapy water and a soft brush clean well. Avoid prolonged sun exposure to protect the irradiated color treatments in both stones.

For your sterling silver settings, SARDA's Jewelry Cleaning Kit makes regular maintenance easy and keeps every piece ready for its next show. And if you're new to gemstone care, our full jewelry care guide covers everything you need to know.

Ready to explore Monday's debut? Shop the full collection at SARDA New Arrivals →