Quartz

Quartz is the family that raised amethyst and citrine, and its other faces deserve the introduction: sunlit lemon, cognac smoky, and rock crystal of glass-like purity. Large, clean, precisely cut stones at prices that invite generous carats.

Natural Lemon Quartz 28.15 ct – Oval Cut, Untreated

2.964,00 CZK

Natural rutilated quartz, 1306.52 carats, cushion mixed cut, transparent brown color with natural rutile inclusions, GGI certified gemstone

Natural Rutilated Quartz 1306.52 ct – Cushion Mixed Cut, Unheated, GGI Certified

98.545,00 CZK

Natural Smoky Quartz 292.45 ct – Round Cut, Heated, ČGL Certified

42.813,00 CZK

Natural smoky quartz, 20.79 carats, oval honeycomb cut, VVS clarity, orangy brown color, 22.05 × 16.24 × 11.23 mm, ČGL certified

Natural Smoky Quartz 20.79 ct – Oval Honeycomb Cut, Heated, ČGL Certified

6.562,00 CZK

The online selection is only part of our sourcing reach.

Certain gemstones are acquired individually for clients and never appear in public collections.

Enquire about a stone you don’t see here

About This Gemstone

Quartz is the most versatile gem family on Earth, and this collection gathers the varieties that live outside the famous names: lemon quartz in sunlit yellows, smoky quartz from warm cognac to deep brown, and colorless rock crystal cut for pure light. The family portrait, including how one mineral produces a dozen different gems, is drawn in Quartz: The Gem Family Behind a Dozen Famous Stones.

The family's commercial gift is scale: quartz crystals grow large and clean, so ten-carat stones with eye-clean clarity remain everyday purchases, and the modest material cost leaves room for precise, even experimental cutting. That is why quartz dominates designer and fancy cuts, where the cutter's time outweighs the rough.

Honesty has specific work to do here, and we do it per stone. Smoky quartz owes its brown to natural irradiation in the ground, but some market material is irradiated artificially; lemon quartz typically receives irradiation and heating to reach its yellow. Each listing states what the stone is and what, if anything, was done to it, per the framework in Treated vs. Untreated Gemstones.

Evaluation follows quartz logic: eye-clean clarity is the baseline the material allows, even color without dead zones separates fine stones from commercial goods, and cut quality decides the rest, a mechanism explained in Understanding Gemstone Color. At 7 on the Mohs scale, every variety here handles daily wear.

Every quartz ships with the Sosna Gems Colored Stone Report, and independent laboratory certification can be arranged on request. The family's celebrated siblings hold their own collections: amethyst, citrine, and ametrine. For a large stone set into a commissioned design, see bespoke jewelry.

Frequently Asked Questions

What is quartz?

Quartz is silicon dioxide, the most versatile gem-producing mineral on Earth. Its varieties include amethyst, citrine, ametrine, lemon quartz, smoky quartz, and colorless rock crystal.

What is lemon quartz?

Lemon quartz is quartz with a bright, sunlit yellow, typically produced by irradiating and heating natural material. The color is stable, and the treatment is stated on every stone we list.

Is smoky quartz natural?

Smoky quartz owes its brown to natural irradiation acting on trace aluminium in the ground. Some market material is irradiated artificially, which is why we state per stone what it is and what was done to it.

What is rock crystal?

Rock crystal is pure, colorless quartz, valued for glass-like transparency and precise cutting. It has served as a gem and carving material for thousands of years.

How is quartz quality evaluated?

Eye-clean clarity is the baseline the material allows, even color without dead zones separates fine stones from commercial goods, and cut quality decides the rest. In this family you are buying selection and cutting more than rarity.

Is quartz durable enough for daily wear?

Yes. At 7 on the Mohs scale, quartz varieties handle rings, pendants, and earrings in daily wear with routine care. Avoid prolonged strong sunlight, which can soften some colors over time.

What documentation comes with a stone?

Every quartz ships with the Sosna Gems Colored Stone Report, our internal documentation. Independent laboratory certification can be arranged on request for any stone.

Can you source a quartz beyond the visible selection?

Yes. The online collection is only part of our sourcing reach. Contact us with the variety, tone, and size you are looking for and we will search individually.

How do I choose between two similar quartz stones?

Judge the cut and the evenness of color. In a family where clean material is abundant, the stone that returns light uniformly across the whole face is the one worth owning, whatever its size.

Sosna Gems is not a licensed financial advisor. Gemstones are collectibles, not securities. Past performance is not indicative of future results. Legal & risk disclosure .