Topaz

Topaz is an aluminum fluorosilicate that crystallizes in granite pegmatites and in gas pockets of volcanic rock. It grows as long, glassy prisms that can reach enormous size, and at 8 on the Mohs hardness scale it is one of the harder common gemstones.

Natural topaz is usually colorless, pale yellow, or brown, but it can also be pink-orange, and the vivid blue topaz sold today is almost always colorless topaz that has been irradiated and heat-treated. Major sources include Brazil, Russia, and Pakistan, and topaz is the traditional birthstone for November. It is also the mineral that defines hardness 8 on the Mohs scale, so it is the standard other stones are measured against.

Topaz can grow remarkably large: crystals weighing several kilograms have been found in Brazilian pegmatites. Its natural color comes from tiny defects and trace elements in the crystal structure, which is why heat or irradiation can change it, and why some topaz colors are less stable than others.

The name has a curious history. It is usually traced to Topazios, an ancient name for a small island in the Red Sea now known as Zabargad. The Roman writer Pliny the Elder described the stone found there as green, and since the island is known for peridot, most scholars believe the "topaz" of antiquity was actually peridot. The name moved to the mineral we call topaz much later.

In the 1800s, the finest orange-pink crystals from Russia's Ural Mountains were reserved for the tsars' court, which is the origin of the name "imperial topaz." Today, Ouro Preto in Brazil is the best-known source of imperial topaz, and the term is used for rich golden-orange to pinkish stones.

Topaz is traditionally a stone of warmth and generosity. Its golden varieties are associated with the sun, confidence, and abundance, while its clear and blue varieties are linked with calm expression. Over the centuries, it has been given as a token of goodwill and carried by people who want to feel bright, steady, and capable.

Topaz's reputation as a stone of goodwill suits its clear, honest look: no cloudiness, no clutter, and light that passes straight through. In traditional lore, that clarity is why topaz is associated with open, truthful expression and with a kind of confidence that does not need to be loud.

Golden topaz is tied to the Solar Plexus Chakra, the energy center of confidence and personal power, and blue topaz to the Throat Chakra, the center of expression. Topaz's Fire element association fits its warm color and its reputation for energy and optimism.

As the November birthstone, topaz is linked with Sagittarius and Scorpio. Sagittarius for the stone's open, optimistic spirit, and Scorpio for its depth and strength.

Topaz varies mostly by color. Imperial topaz is the rare golden-orange to pink-orange stone, while blue topaz, from pale "sky" to deep "London" blue, is the most popular and affordable. Colorless topaz is sometimes sold as "white topaz," and rarer natural pinks and sherry-brown stones exist as well. Mystic topaz is clear topaz given a rainbow surface coating, which is a treatment rather than a natural variety.

Color matters when choosing among them. Warm golden and imperial stones lean toward confidence and abundance, while the cool blues lean toward calm self-expression, so many people pick the shade that matches the quality they most want to invite.

At 8 on the Mohs scale, topaz is hard enough for everyday wear, but hardness and toughness are not the same thing. Hardness is resistance to scratching, and topaz has plenty of it. Cleavage is a plane of weakness inside the crystal, and topaz has a perfect one in a single direction, so a sharp knock can split it. Choose settings that protect the stone for rings. It is water-safe and cleans well with warm soapy water; avoid sudden temperature changes, ultrasonic cleaners, and harsh chemicals. Some topaz colors can also fade with prolonged strong sunlight.

Traditionally, topaz is cleansed in moonlight. Our Crystal Combinations guide has ideas for pairing it. For a related yellow stone, see Citrine.

Because natural blue topaz is rare, price and disclosure are good guides: a deep, saturated blue at a low price is almost certainly treated. That is normal for the trade, but worth knowing. Natural imperial topaz in golden-orange is the most valuable form.