Monday's drop is one of the most stone-diverse debuts of the season. From the rare hillsides of Tanzania to the coastlines of New Zealand, this week's lineup spans continents and a full spectrum of color. Here's your complete field guide to every major stone making its SARDA™ debut on June 8.

Tanzanite

Found only within a three-square-mile stretch near the base of Mount Kilimanjaro, tanzanite is one of the world's rarest gems — mined exclusively in Tanzania's Merelani Hills. Its defining trait is a striking color shift between vivid blue and violet depending on the angle and type of light, a phenomenon called pleochroism. The debut tanzanite is heat-treated — a standard and universally accepted practice that coaxes out the blue-violet hue from the brownish-orange rough stone. Cut into 12mm cushion square cabochons at an impressive 8.84 carats, these stones anchor the Linked in Faith Interchangeable Bracelet Component™ and the Mercy Remains Ring™. Smaller round cabochons at 2.55 ctw light up the Mercy Swallowed Mistakes Earrings™. Tanzanite sits at 6–7 on the Mohs scale — durable enough for regular wear with reasonable care. Clean with a soft cloth and mild soapy water; avoid steam and ultrasonic cleaners. Learn more about tanzanite at GIA.

Galaxy Abalone Mosaic

Not every gemstone is born underground — some come from the sea. Galaxy Abalone Mosaic is crafted from New Zealand Pāua abalone shell, prized for its intense, shifting iridescence in greens, blues, purples, and gold. Artisans cut the shell into precise segments and assemble them into a seamless mosaic tile, producing a cushion-square face that changes color with every shift in light. At 12mm and 5.61 carats, it fills the Linked in Faith Interchangeable Bracelet Component™; at a generous 14mm and 8.16 carats, it becomes the focal point of the Mercy Will Follow Me Pendant™. Because Galaxy Abalone Mosaic is an assembled shell material, it sits at approximately 3.5–4 on the Mohs scale — among the more delicate materials in this drop. Avoid ultrasonic cleaners, steam, and prolonged water exposure; wipe gently with a soft, slightly damp cloth. Read more about abalone at the International Gem Society.

Green Opal and Seafoam Chalcedony

This India-sourced pair brings an organic, nature-inspired palette to the debut. Green Opal is the quieter sibling of the flashy precious opal — a more opaque stone in soft sage and pistachio tones, left entirely untreated in this lineup, which is a mark of quality. The debut stones are cut into large 20×15mm oval cabochons at a substantial 9.35 carats — commanding focal stones in the U Will Be Restored Bracelet™ and Ring™. Alongside it, Seafoam Chalcedony brings a translucent blue-green wash. A member of the quartz family, it has been dyed to achieve its signature seafoam color and cut into 12×10mm checkerboard cabochons at 4.25 carats for subtle textural sparkle. Together they appear across the bracelet, ring lineup, and the U Will Be Restored Pendant™. Opal sits at 5.5–6.5 on the Mohs scale (avoid impacts and sudden temperature changes); chalcedony is a harder 6.5–7. Both clean well with mild soap and warm water. Opal at GIA | Chalcedony at the International Gem Society.

Serenity Blue Chalcedony and Angelite

The debut's most dramatic pairing belongs to the Seen UR Faithfulness collection. Serenity Blue Chalcedony — hand-carved into a long 24×12mm cushion at a remarkable 20.57 carats per stone — delivers a sculptural, cloud-blue centerpiece unlike anything in a standard gem lineup. Chalcedony has appeared in Roman signet rings, Medieval cameos, and Victorian jewelry for centuries; this carved version brings a soft, modern elegance to that lineage. Joining it is Angelite, sourced from Peru, a pale blue-grey stone formed from compressed celestite. Its oval 14×10mm cabochons at 5.95 carats add a quiet, milky counterpoint. This pairing spans the Seen UR Faithfulness Bracelet™, two ring styles, and the show-stopping Seen UR Faithfulness Necklace™ — a 20-inch statement piece with magnetic extender. Angelite is notably soft at just 3.5 on the Mohs scale; store it separately from other jewelry, skip the cleaners and steam, and use only a soft damp cloth. Learn about angelite at the International Gem Society.

Tanzanian Ruby

Rubies are among history's most prized gemstones — celebrated across cultures from ancient Burma to Imperial China for their deep, saturated red. This week's debut features something particularly worth noting: ruby sourced from Tanzania, left entirely without treatment. While the vast majority of rubies on the market are heat-treated to improve color and clarity, these round checkerboard cabochons carry their deep red-to-raspberry hue exactly as nature produced them. Tanzania's ruby deposits — concentrated primarily in the Songea and Morogoro regions — have gained growing recognition for producing stones with vivid, warm tones. Cut at 7mm (1.87 ctw) for the One That See's Me Ring III™ and 8mm (2.93 ctw) for Ring II™, they sit in sterling silver settings crafted to let the stone lead. Ruby ranks Mohs 9 — second only to diamonds and moissanite — making it one of the most durable gemstones for everyday wear. Clean with mild soap, a soft brush, and warm water. Explore ruby at GIA.

Caring for This Week's Stones

• Ruby (Mohs 9): Extremely durable. Mild soap, a soft brush, and warm water are all you need.
• Tanzanite (Mohs 6–7): No steam or ultrasonic cleaners. A soft cloth and mild soapy water keep it clean safely.
• Seafoam Chalcedony (Mohs 6.5–7): Mild soap and warm water. Avoid prolonged sun exposure on dyed stones to preserve color.
• Green Opal (Mohs 5.5–6.5): Avoid dry conditions, extreme heat, and impacts. Mild soap and water; no ultrasonic cleaners.
• Galaxy Abalone Mosaic (Mohs ~3.5–4): Soft damp cloth only — no chemicals, cleaners, or steamers.
• Angelite (Mohs 3.5): The most delicate stone in this drop. Store separately, handle with care, and clean only with a soft damp cloth.

For your sterling silver settings, our complete silver care guide covers everything from daily wear to long-term storage. Our Jewelry Cleaning Kit is safe for ruby, tanzanite, and chalcedony — use the included soft cloth only for abalone mosaic and angelite.

Ready to shop? All of this week's debuts go live Monday, June 8 — browse them first at SARDA™ New Arrivals.