Birthstones
The stones of each month in two trade lists: Jewelers of America (US), created in 1912, and the National Association of Goldsmiths (UK). They are trade lists, not official standards.
Each month shows the color of its stones, in the same tones as their entries in Pigmentoria: first the US stones, then those only GIA adds, then those only in the British list. The US list has changed three times: in 1952, 2002 and 2016.
January
US: garnet · UK: garnet
In the Jewelers of America list (US): garnet. In the British list of the National Association of Goldsmiths: garnet, with dark red as the color of the month.
Each swatch is the stone in the same tone as its own entry in Pigmentoria.
Garnet
Garnet, in the lists of: US, GIA, UK.
Material: Garnet, January birthstone
RGB(158, 27, 50)
February
US: amethyst · UK: amethyst
In the Jewelers of America list (US): amethyst. In the British list of the National Association of Goldsmiths: amethyst, with purple as the color of the month.
Each swatch is the stone in the same tone as its own entry in Pigmentoria.
Amethyst
Amethyst, in the lists of: US, GIA, UK.
Material: Amethyst, February birthstone
RGB(138, 79, 179)
March
US: aquamarine · UK: aquamarine and bloodstone
In the Jewelers of America list (US): aquamarine. In the British list of the National Association of Goldsmiths: aquamarine and bloodstone, with pale blue as the color of the month.
GIA also lists bloodstone, or heliotrope: a dark green chalcedony with red spots of iron oxide.
Aquamarine
Aquamarine, in the lists of: US, GIA, UK.
Material: Aquamarine, March birthstone
RGB(127, 198, 214)
Bloodstone
Bloodstone, in the lists of: GIA, UK.
Material: Bloodstone, March birthstone
RGB(46, 74, 54)
April
US: diamond · UK: diamond and rock crystal
In the Jewelers of America list (US): diamond. In the British list of the National Association of Goldsmiths: diamond and rock crystal, with white as the color of the month.
Each swatch is the stone in the same tone as its own entry in Pigmentoria.
Diamond
Diamond, in the lists of: US, GIA, UK.
Material: Diamond, April birthstone
RGB(238, 241, 244)
Rock crystal
Rock crystal, in the lists of: UK.
Material: Rock crystal, April birthstone
RGB(244, 246, 248)
May
US: emerald · UK: emerald and chrysoprase
In the Jewelers of America list (US): emerald. In the British list of the National Association of Goldsmiths: emerald and chrysoprase, with green as the color of the month.
Each swatch is the stone in the same tone as its own entry in Pigmentoria.
Emerald
Emerald, in the lists of: US, GIA, UK.
Material: Emerald, May birthstone
RGB(15, 138, 95)
Chrysoprase
Chrysoprase, in the lists of: UK.
Material: Chrysoprase, May birthstone
RGB(93, 184, 120)
June
US: pearl, moonstone and alexandrite · UK: pearl and moonstone
In the Jewelers of America list (US): pearl, moonstone and alexandrite. In the British list of the National Association of Goldsmiths: pearl and moonstone, with cream as the color of the month.
Alexandrite joined the US list in 1952.
Pearl
Pearl, in the lists of: US, GIA, UK.
Material: Pearl, June birthstone
RGB(244, 238, 226)
Moonstone
Moonstone, in the lists of: US, GIA, UK.
Material: Moonstone, June birthstone
RGB(232, 236, 242)
Alexandrite
Alexandrite, in the lists of: US, GIA.
Material: Alexandrite, June birthstone
RGB(46, 138, 110)
July
US: ruby · UK: ruby and carnelian
In the Jewelers of America list (US): ruby. In the British list of the National Association of Goldsmiths: ruby and carnelian, with red as the color of the month.
Each swatch is the stone in the same tone as its own entry in Pigmentoria.
Ruby
Ruby, in the lists of: US, GIA, UK.
Material: Ruby, July birthstone
RGB(176, 18, 43)
Carnelian
Carnelian, in the lists of: UK.
Material: Carnelian, July birthstone
RGB(200, 88, 42)
August
US: peridot and spinel · UK: peridot and sardonyx
In the Jewelers of America list (US): peridot and spinel. In the British list of the National Association of Goldsmiths: peridot and sardonyx, with pale green as the color of the month.
Spinel joined in 2016. GIA also lists sardonyx, the oldest of the three: bands of brownish red to dark orange sard alternating with white or black onyx.
Peridot
Peridot, in the lists of: US, GIA, UK.
Material: Peridot, August birthstone
RGB(156, 190, 46)
Spinel
Spinel, in the lists of: US, GIA.
Material: Spinel, August birthstone
RGB(200, 30, 58)
Sardonyx
Sardonyx, in the lists of: GIA, UK.
Material: Sardonyx, August birthstone
RGB(154, 74, 38)
September
US: sapphire · UK: sapphire and lapis lazuli
In the Jewelers of America list (US): sapphire. In the British list of the National Association of Goldsmiths: sapphire and lapis lazuli, with deep blue as the color of the month.
Each swatch is the stone in the same tone as its own entry in Pigmentoria.
Sapphire
Sapphire, in the lists of: US, GIA, UK.
Material: Sapphire, September birthstone
RGB(31, 63, 154)
Lapis lazuli
Lapis lazuli, in the lists of: UK.
Material: Lapis lazuli, September birthstone
RGB(42, 74, 168)
October
US: opal and tourmaline · UK: opal
In the Jewelers of America list (US): opal and tourmaline. In the British list of the National Association of Goldsmiths: opal, with variegated as the color of the month.
Tourmaline joined the US list in 1952.
Opal
Opal, in the lists of: US, GIA, UK.
Material: Opal, October birthstone
RGB(232, 238, 240)
Tourmaline
Tourmaline, in the lists of: US, GIA.
Material: Tourmaline, October birthstone
RGB(208, 48, 94)
November
US: citrine and topaz · UK: topaz and citrine
In the Jewelers of America list (US): citrine and topaz. In the British list of the National Association of Goldsmiths: topaz and citrine, with yellow as the color of the month.
Citrine joined the US list in 1952.
Citrine
Citrine, in the lists of: US, GIA, UK.
Material: Citrine, November birthstone
RGB(232, 169, 58)
Topaz
Topaz, in the lists of: US, GIA, UK.
Material: Topaz, November birthstone
RGB(232, 135, 58)
December
US: turquoise, tanzanite and blue zircon · UK: tanzanite and turquoise
In the Jewelers of America list (US): turquoise, tanzanite and blue zircon. In the British list of the National Association of Goldsmiths: tanzanite and turquoise, with sky blue as the color of the month.
Zircon joined the US list in 1952 and tanzanite in 2002.
Turquoise
Turquoise, in the lists of: US, GIA, UK.
Material: Turquoise, December birthstone
RGB(62, 184, 192)
Tanzanite
Tanzanite, in the lists of: US, GIA, UK.
Material: Tanzanite, December birthstone
RGB(74, 74, 184)
Blue zircon
Blue zircon, in the lists of: US, GIA.
Material: Blue zircon, December birthstone
RGB(63, 168, 200)
Pigmentoria is an independent color atlas. Gem, variety, place and trade names (for example «pigeon's blood» or «Paraíba») are used descriptively only and do not indicate the origin, quality, treatment or certification of any stone. The colors are our own digital approximations, not official standards of any laboratory. GIA, CIBJO, LMHC, SSEF, Gübelin and the other organisations cited belong to their owners; Pigmentoria is not affiliated with or endorsed by them.