We work primarily with 14k and 18k solid gold and natural diamonds, chosen for their enduring beauty and integrity. Select designs are also available in sterling silver and brass, offering a range of textures and tones to suit different styles and stories. Each material is carefully considered, both for its aesthetic character and how it lives on the skin.

Yes — we do. Our ring sizing guide includes tips for measuring at home. Still not sure? You can email us at info@fiatluxsf.com and we’ll send you a ring sizing kit, gratis — no strings, just support. If you order a custom size and it doesn’t fit just the way you want, we’ll do our best to assist. However, please note that the responsibility for communicating the correct size ultimately rests with you.

Gold is resilient but prone to surface dullness from oils and residue.

• Clean with warm water and mild dish soap; gently scrub with a soft toothbrush.
• Avoid chlorine, bleach, and abrasive cleaners—they can weaken or discolor gold.
• Store separately in a soft pouch or lined box to prevent scratches from harder materials.

Diamonds are the hardest natural material, but they attract oils that dull their brilliance.

• Soak in warm water with a few drops of dish soap.
• Brush gently with a soft toothbrush, especially behind the stone.
• Dry with a lint-free cloth.
• Avoid harsh chemicals and ultrasonic cleaners unless professionally advised

Sapphires are tough but sensitive to sudden temperature changes and some chemicals.

• Clean with warm soapy water and a soft brush.
• Avoid ammonia-based cleaners and extreme heat.
• Store individually to prevent contact with harder stones like diamonds.

Rubies share sapphire’s durability but can cloud from residue buildup.

• Clean similarly: warm water, mild soap, soft brush.
• Avoid gardening or household tasks while wearing them — abrasion can dull their surface.
• Polish gently with a soft cloth between cleanings to maintain luster.

Opals are ethereal but fragile, composed of hydrated silica and often containing 3–6% water.

• Clean gently with mild soap and warm water using a soft cloth — never soak or use ultrasonic cleaners.
• Avoid sudden temperature changes, direct sunlight, and dry environments, which can cause cracking or “crazing.”
• Store in a soft pouch or sealed bag with a damp cotton ball to maintain moisture.

Elegant yet prone to tarnish due to its copper content (92.5% silver, 7.5% alloy).

• Polish with a soft microfiber or silver-specific cloth using long, gentle strokes. Avoid paper towels — they can scratch.
• Clean with mild dish soap and warm water. Rinse thoroughly and dry immediately.
• Avoid exposure to sulfur, chlorine, sweat, and harsh sunlight — all accelerate tarnishing.

Store in anti-tarnish pouches or airtight containers with silica gel or chalk to absorb moisture.

Bold and golden, but reactive to air and moisture, leading to patina or verdigris.

• Polish with a jewelry cloth or a gentle brass cleaner. For natural options, a paste of lemon juice and baking soda works wonders.
• Clean with mild soap and water, then dry thoroughly to prevent spotting.
• Avoid prolonged moisture, lotions, and perfumes.
• Store in breathable fabric pouches to allow air circulation while minimizing oxidation.

We proudly stand behind the craftsmanship of every Fiat Lux creation and the products of our designers. If your piece exhibits an issue due to a manufacturing defect, we will take full responsibility and offer either a repair or replacement, at our discretion, at no additional cost to you.

For all other concerns — including wear, damage, fit adjustments, or material changes — we kindly ask that the item be brought to our studio for in-person evaluation. If an in-person visit isn't possible, the client may opt to mail the item to us. Please note:

• All shipping costs — both to and from our studio — are the client’s responsibility
• We recommend using a trackable, insured shipping method
• Fiat Lux is not liable for items lost or damaged in transit

For mailing instructions or guidance on sending your item in, please reach out to us at info@fiatluxsf.com.

Upon receipt of your item, we will:

• Assess the condition of the piece
• Determine what repairs may be feasible
• Provide an estimate of repair cost and timeline
• Request client approval prior to proceeding

Our goal is to ensure each piece continues its journey with you, beautifully and intentionally. If you have any questions or need guidance prior to your visit, please don’t hesitate to reach out at info@fiatluxsf.com.