40 Fun Facts About Garnet

Garnet's name is usually traced to the medieval Latin name of which fruit?

Pomegranate is the usual explanation: the medieval Latin granatus is thought to recall the fruit's red seeds, which small garnet crystals resemble. The plant's botanical name, Punica granatum, carries the same word.

Prospectors follow trails of unusual garnets to find deposits of which precious gem?

Diamonds ride to the surface in volcanic pipes beside far more numerous garnets, so geologists track the garnets back to the pipe. Some Canadian pipes were found by following trails left by moving ice.

Which everyday workshop abrasive is still sold with a reddish cutting grit of crushed garnet?

Sandpaper made with garnet keeps cutting because the grains fracture as you sand, exposing fresh sharp edges. Cabinetmakers favour it for finishing bare wood.

Which jeweller's designs made green demantoid garnets popular in Russia before the 1917 revolution?

Fabergé set the brilliant green stones in jewellery for Russia's elite, but after the revolution they fell out of style in the austere Soviet years.

Garnets come in nearly every colour, but which is the rarest, first reported only in the 1990s?

Blue garnets turned up in the late 1990s at Bekily in Madagascar, and they shift towards purple under a warm lamp.

Factories blast garnet grit in a high-pressure jet of what to slice through steel and stone?

Water carries the garnet at such pressure that the jet cuts metal, ceramic and stone with very little dust and at a low temperature.

The Subway Garnet, a 15 cm almandine crystal discovered in 1885, turned up in which American city?

New York yielded the six-inch stone, which the city's Mineralogical Club keeps with some 700 local specimens at the American Museum of Natural History.

Garnet is the traditional birthstone for people born in which month of the year?

January's stone is tougher than its soft glow suggests: it can scratch opals and pearls, though rubies and sapphires will scratch it in turn.

Which luxury jeweller named the green garnet tsavorite and began marketing it to the public in 1974?

Tiffany & Co. president Henry Platt proposed the name in honour of Tsavo, the Kenyan national park near where the gem was mined.

In which animated series does Garnet, voiced by singer Estelle, lead the Crystal Gems?

Steven Universe makes Garnet a fusion of two smaller Gems, Ruby and Sapphire, who stay merged out of love for each other.

Garnet's hardness of about 6.5 to 7.5 on the Mohs scale sits close to which common mineral?

Quartz sits at 7 on the Mohs scale, right in garnet's range, which is why the gem is hard enough to work as an industrial abrasive.

Hessonite, an orange-brown grossular garnet, has long been nicknamed after which kitchen spice?

Cinnamon stone is hessonite's old nickname, while 'hessonite' itself comes from the Greek for inferior, because it is softer and less dense than most other garnets.

Rhodolite, a pink garnet first described in North Carolina, is named from Greek for which flower?

Rose is 'rhodon' in Greek, a root rhodolite shares with other pink minerals such as rhodonite and rhodochrosite.

Ancient Romans pressed carved garnet signet rings into which material to seal important documents?

Wax took the stamp of a garnet intaglio, a design carved into the stone, centuries before red garnets became a favourite of medieval clergy and nobles.

In legend, a glowing red garnet was among four precious stones that God gave to which biblical king?

Solomon's stone went by an old name once used for almost any red gem, though it most often meant a red garnet.

Which astronomer gave the red star Mu Cephei its nickname by comparing its colour to a garnet?

William Herschel, the discoverer of Uranus, made the comparison, and in 2024 the International Astronomical Union approved Garnet Star as the red supergiant's official name.

Bright orange spessartine garnets are sold under a trade name borrowed from which citrus fruit?

Mandarin garnets get their orange from a high spessartine content; the more almandine is mixed into the crystal, the redder or browner it turns.

Melanite, an andradite garnet popular in Victorian jewellery, is which colour, thanks to titanium?

Black melanite was worn alongside jet and dark chalcedony when Victorian fashion favoured dark gems.

Garnet is the suggested gemstone for which early wedding anniversary, long before silver or gold?

Second anniversaries get garnet, a durable gem that is usually sold untreated and is common enough in red to stay affordable.

Golden 'horsetail' inclusions, prized in demantoid garnets, are curving threads of which mineral?

Asbestos, in its chrysotile form, makes the curving golden threads, and buyers welcome them as a sign of prestigious Russian origin.

Which Anglo-Saxon ship burial, uncovered in Suffolk in 1939, held gold clasps set with garnets?

Sutton Hoo's clasps carry interlocking wild boars worked in garnet, and no other Anglo-Saxon clasps of their kind are known.

Star garnets, which show a four- or six-rayed star, occur almost only in India and which US state?

Idaho's star garnets are rarer than star rubies or star sapphires, and the public can dig for them at a national forest site near St. Maries.

Which old name, from the Latin for a glowing coal, was given to red garnets cut with a smooth dome?

Carbuncle once covered almost any red gem, and some English Bibles use the word for the fourth stone in the high priest's breastplate.

The red garnet pyrope takes its name from two Greek words that together mean what?

Fiery-eyed pyrope is less common than most garnets yet widely worn, and it picked up misleading trade names such as Cape ruby and Arizona ruby.

Which region, now in the Czech Republic, supplied the red pyrope garnets of Victorian jewellery?

Bohemia's garnet deposits were found around 1500 and fed a regional jewellery industry that peaked in the late 1800s.

Garnets, from red almandine to green uvarovite, form crystals in which of the crystal systems?

Cubic symmetry is the rule for the gem garnets, yet the crystals almost never form actual cubes: they most often grow as twelve-faced dodecahedra.

Grossular garnet takes its name from the old botanical name of which berry?

Gooseberry-green grossular found in Siberia inspired the name, though the species also comes in brown, red and yellow.

Demantoid garnet was discovered in 1851 in the gravels of which mountain range, near Ekaterinburg?

Ural miners were stunned by how brightly the green stones sparkled, which is unusual for a garnet, and more turned up along the Bobrovka River in the 1970s and 1980s.

Spessartine garnet is named after the Spessart, low wooded mountains in which European country?

Germany's Spessart, in Bavaria, is the mineral's type locality, the place where it was first described.

Almandine garnet's name corrupts a term which ancient author used for a stone from Alabanda?

Pliny the Elder wrote of 'alabandicus', a stone found or worked at Alabanda, a town in Caria in Asia Minor.

Gore Mountain, long mined for some of the world's largest garnet crystals, lies in which American mountain range?

Adirondacks garnet was first mined at Gore Mountain in 1878, when Henry Hudson Barton began digging it to make abrasives; the mine moved to nearby Ruby Mountain in 1983.

Some 3,500 garnet-inlaid pieces lay in which Anglo-Saxon treasure, found by metal detector in 2009?

Staffordshire Hoard finder Terry Herbert was searching freshly ploughed farmland, and the haul held over 5 kg of gold, much of it fittings stripped from weapons.

The Lion of Merelani, a 116-carat green tsavorite garnet, was donated in 2022 to which institution?

The Smithsonian put the gem on display in 2023; its cutter rehearsed on a synthetic copy before spending about a month on the real stone.

Which technique sets thin garnet slices in tiny gold cells, as on Anglo-Saxon sword fittings?

Cloisonné garnet work was a signature style of the peoples who took over the Western Roman Empire, and for Christians the red stone symbolised Christ.

The synthetic garnet YAG, made with yttrium and aluminium, is the working crystal in which devices?

Lasers built around neodymium-doped YAG are used by eye surgeons after cataract operations, and a Bell Laboratories team first ran one in 1964.

Garnet most often grows when heat and pressure turn shale into which mica-rich metamorphic rock?

Schist garnets start as tiny grains and swell slowly, swallowing bits of the surrounding rock, which is why clean gem-quality crystals are hard to find.

Garnet stands apart from other common transparent gems by visibly responding to which simple tool?

A strong magnet will pick up a garnet, and measuring how strongly a stone is attracted helps gemologists tell one garnet species from another.

Rare garnets that change colour between daylight and lamplight are often compared to which gem?

Alexandrite is famous for the same trick, and colour-change garnets, which owe it largely to vanadium, are the rarest garnets of all.

In the nine-gem Navaratna of Vedic astrology, hessonite garnet stands for which shadow planet?

Rahu takes the hessonite, while a ruby for the Sun always sits at the centre of a Navaratna jewel.

Traces of which metal, also the colouring agent in emerald, turn demantoid garnet green?

Chromium slips into the crystal to make the green, while the garnet's own iron adds the yellowish tint many stones show.