Topaz: Unraveling the Radiance of November's Enchanting Birthstone

November has two birthstones — topaz and citrine — but topaz is the older and more storied of the pair. Named from either the Sanskrit tapas (meaning fire) or the Greek topazios (an island in the Red Sea where chrysolite was mined), topaz has been worn for at least 2,000 years. This guide covers what topaz is, the main varieties and colors, and what to look for when buying one.

In short: Topaz is November's primary birthstone — a silicate mineral that occurs in blue, yellow, brown, orange, pink, and the prized golden-orange "imperial" variety. Mohs 8 hardness makes it durable for daily wear, though its perfect cleavage plane means avoiding ultrasonic cleaning. Blue topaz dominates the market and is almost always treated; a 1-carat sky blue topaz pendant starts around $200-350. Imperial topaz from Brazil is the rare and valuable variety at $800-2,500+ per carat.

What topaz is

Topaz is a silicate mineral (Al₂SiO₄(F,OH)₂) that crystallizes in long prismatic shapes. Pure topaz is colorless; trace elements produce blue, yellow, brown, orange, pink, and the prized imperial topaz with its golden-orange-to-pink hue. Topaz scores 8 on the Mohs hardness scale — durable enough for daily-wear jewelry — though its perfect basal cleavage means it can split along that plane if struck at the right angle.

Blue topaz — the most-worn variety

Sky blue, Swiss blue, and London blue topaz dominate the market. Almost all blue topaz on the market today starts as colorless stone and is irradiated and then heat-treated to develop the blue color. The treatment is stable, permanent, and disclosed on every reputable lab report. Sky blue is the lightest shade, Swiss blue is medium intensity, and London blue is the deepest steel-blue tone. Blue topaz delivers excellent visual impact at a low price point — a 1-carat stone runs $60–$160 depending on shade.

Imperial topaz — the rare and valuable variety

Imperial topaz from the Ouro Preto mines in Brazil ranges from golden yellow through sunset orange to pinkish red. It is the most valuable variety of topaz and was historically reserved for Russian czars, which is where the name originated. Fine imperial topaz commands prices closer to fancy sapphire — $400–$2,000 per carat for the best color ranges. Unlike blue topaz, imperial topaz is naturally colored and not commonly treated.

Hardness, durability, and care

Topaz is hard (Mohs 8) but its cleavage plane makes it less forgiving than sapphire or diamond. Avoid ultrasonic and steam cleaning — the vibration can split a cleavage-prone stone. Clean with warm water and mild soap using a soft brush. Store topaz separately from other gemstones so it does not get knocked against harder stones. For ring settings, a bezel or protective halo extends the practical life of a topaz center stone significantly.

Topaz vs citrine — the other November birthstone

Yellow topaz and citrine (yellow quartz) are often confused. Topaz is harder (Mohs 8 vs 7 for citrine), has higher refractive index, and tends to show a deeper, richer yellow. Citrine is more affordable and easier to source in large clean stones because it lacks the cleavage issues of topaz. For November birthday gifts, blue topaz is the most popular choice; citrine is a softer-priced alternative for buyers who prefer the warm yellow tone.

Buying topaz — what to look for

For blue topaz: pick the shade that suits the wearer's preference (lighter sky blue for a softer look, London blue for a bolder statement). Clarity should be eye-clean — topaz is typically very clean, so inclusions visible to the naked eye are a value cut. For imperial topaz: prioritize saturated color over carat weight; a vivid 1-carat imperial often costs more than a pale 3-carat stone. Always ask for a treatment disclosure on any blue topaz purchase.

Frequently Asked Questions

Is topaz a good choice for an engagement ring?

Topaz works for engagement rings but requires more careful wearing than sapphire or diamond because of its cleavage plane. A bezel setting protects the stone from impact and is the safest choice. For brides with active lifestyles or hands-on jobs, sapphire (Mohs 9) is a more practical alternative. For occasion wear or pendant-mounted statement pieces, topaz is excellent.

Are blue topaz stones natural?

Almost no commercially-available blue topaz is naturally blue — natural blue topaz exists but is so rare and pale that it is essentially absent from the market. Virtually all blue topaz you see in jewelry shops started as colorless stone and was irradiated and heat-treated to produce the blue. The treatment is stable and permanent, and reputable jewelers always disclose it on the lab report.

How does topaz compare to sapphire?

Sapphire is harder (Mohs 9 vs 8), more scratch-resistant, has no cleavage plane (so it does not split), and commands significantly higher prices per carat. Blue sapphire and blue topaz can look superficially similar but a side-by-side comparison shows sapphire's deeper saturation and more cohesive color. For a daily-wear stone, sapphire is the more practical choice; for visual impact at a lower price, blue topaz wins.

How much does topaz jewelry cost?

A 1-carat sky blue topaz set in 14kt gold pendant or earrings starts around $200–$350. Swiss and London blue at the same size and metal sit at $280–$500. A 1-carat imperial topaz (the most valuable variety) sets in fine jewelry from $800–$2,500 depending on color saturation. By comparison, a 1-carat blue sapphire of comparable color starts around $1,100–$2,000 set.

Can topaz scratch other gemstones?

Topaz is hard enough (Mohs 8) to scratch quartz, opal, and most softer gemstones. It is in turn scratched only by corundum (Mohs 9 — sapphire and ruby) and diamond (Mohs 10). When storing topaz jewelry alongside other pieces, keep softer stones in separate compartments to avoid scratching, and avoid putting topaz against sapphire or diamond which could scratch the topaz.

Topaz jewelry at Reve

Reve Diamonds creates bespoke topaz pendants, earrings, and rings in our New York showroom. Browse our pendants & necklaces collection for fine jewelry, or visit us for a custom commission with a topaz center stone.