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Natural Gemstones

THE DIMIRA GEMSTONE GUIDE

Natural Gemstones

Our gemstones, each chosen by eye for colour, light and character, then set by hand in sterling silver with 18K gold plating.

Birthstones & Meanings

For centuries, gemstones have marked birth months and carried quiet meanings. Find yours.

January

Garnet

traditionally associated with devotion and friendship

A wine-red glow, rich with vintage character.

Shop Garnet →

Opal

October birthstonehope and inspiration

Where light becomes colour.

Opal is formed from tiny spheres of silica laid down in the earth over thousands of years. When light passes between them it splits into flashes of colour, an effect known as play-of-colour, which shifts as the stone moves. No two opals show the same pattern.

MINERAL
Hydrated silica
HARDNESS
5.5–6.5 Mohs
BIRTHSTONE
October

Care: Keep away from heat, sudden temperature changes and chemicals; clean with a soft dry cloth.

Rose Quartz

love and tenderness

Where softness becomes light.

Rose quartz owes its gentle blush to trace elements within the crystal. Our star rose quartz is chosen for something rarer: fine inclusions that, in strong natural light, gather into a soft, star-like glow across the surface.

MINERAL
Quartz
HARDNESS
7 Mohs
KNOWN FOR
Soft pink, star-like glow

Care: Avoid long exposure to strong sunlight; clean with lukewarm water and mild soap.

Garnet

January birthstonedevotion and friendship

Where warmth meets light.

Garnet is a family of minerals rather than a single stone. Our red garnets carry the deep, warm colour garnet is known for, with a glassy brilliance that brings richness to vintage-inspired designs.

MINERAL
Garnet group
HARDNESS
6.5–7.5 Mohs
BIRTHSTONE
January

Care: Durable for everyday wear; clean with lukewarm water and mild soap.

Purple Garnet

January birthstonedevotion and friendship

Wine-dark violet.

Purple garnet joins the depth of red garnet with a violet undertone, giving a rich, wine-like colour that glows in warm light. It shares the brilliance and durability of the garnet family.

MINERAL
Garnet group
HARDNESS
7–7.5 Mohs
BIRTHSTONE
January

Care: Durable for everyday wear; clean with lukewarm water and mild soap.

Amethyst

February birthstonecalm and clarity

Where twilight becomes colour.

Amethyst is the purple variety of quartz, coloured by traces of iron within the crystal. Its tones range from soft lilac to deep violet, and a well-cut stone shows flashes of red and blue as it catches the light.

MINERAL
Quartz
HARDNESS
7 Mohs
BIRTHSTONE
February

Care: Avoid long exposure to strong sunlight, which can soften its colour.

Tanzanite

December birthstonetransformation

Where blue turns to violet.

Tanzanite is found in only one place on earth: the foothills of Mount Kilimanjaro in Tanzania. It is strongly trichroic, which means it shows blue, violet and burgundy tones from different angles, so the stone seems to change as you move.

MINERAL
Zoisite
HARDNESS
6–6.5 Mohs
BIRTHSTONE
December

Care: Avoid knocks, heat and ultrasonic cleaners; store separately from harder stones.

Loose aquamarine gemstone by DIMIRA

Aquamarine

March birthstoneserenity and courage

Where the sea meets the sky.

Aquamarine is a member of the beryl family, coloured a clear sea-blue by traces of iron. Prized for its transparency and calm tone, it brings a cool, luminous note to every design.

MINERAL
Beryl
HARDNESS
7.5–8 Mohs
BIRTHSTONE
March

Care: Durable for everyday wear; clean with lukewarm water and mild soap.

Larimar

the calm of the sea

The sea in a stone.

Larimar is a blue variety of pectolite found only in the Dominican Republic. Its sky-to-sea blues, streaked with white, recall light on shallow water, and each stone carries its own pattern.

MINERAL
Pectolite
HARDNESS
4.5–5 Mohs
ORIGIN
Dominican Republic

Care: A softer stone: avoid knocks, sunlight and chemicals; wipe with a soft cloth.

Topaz

November birthstonewarmth and friendship

Where light takes form.

Topaz is one of the hardest gemstones used in jewellery, with a crisp brilliance that suits both delicate and statement designs. Our topaz ranges from clear sky blue to deep London blue.

MINERAL
Topaz
HARDNESS
8 Mohs
BIRTHSTONE
November (also December for blue topaz)

Care: Hard but can chip with a sharp knock; clean with lukewarm water and mild soap.

Emerald

May birthstonerenewal and love

Where nature finds its deepest green.

Emerald is the green variety of beryl, coloured by chromium and vanadium. Most emeralds hold fine natural inclusions, traditionally called their "jardin", or garden, which are part of each stone's character.

MINERAL
Beryl
HARDNESS
7.5–8 Mohs
BIRTHSTONE
May

Care: Avoid heat, steam and ultrasonic cleaners; wipe with a soft, slightly damp cloth.

Tsavorite

January birthstonedevotion and friendship

Where forest light turns green.

Tsavorite is a rare green garnet, discovered in East Africa in the late 1960s. Its vivid, leafy green and lively brilliance make it one of the most luminous green gemstones.

MINERAL
Grossular garnet
HARDNESS
7–7.5 Mohs
ORIGIN
East Africa

Care: Durable for everyday wear; clean with lukewarm water and mild soap.

Diopside

growth and renewal

Forest green, softly lit.

Chrome diopside takes its deep green from chromium. In daylight it shows the colour of moss and fern; in warm evening light it deepens toward forest green.

MINERAL
Diopside
HARDNESS
5.5–6 Mohs
KNOWN FOR
Deep forest green

Care: A softer stone: avoid knocks and store separately from harder stones.

Peridot

August birthstonelight and optimism

Where sunlight meets green.

Peridot is the gem variety of olivine and one of the few gemstones that occurs in a single colour family, from lime to olive green. Formed deep in the earth and brought up by volcanic activity, it has also been found in meteorites.

MINERAL
Olivine
HARDNESS
6.5–7 Mohs
BIRTHSTONE
August

Care: Avoid sudden temperature changes and acids; clean with lukewarm water and mild soap.

Citrine

November birthstonejoy and abundance

Where sunlight becomes gold.

Citrine is the golden variety of quartz, ranging from pale lemon to warm honey and amber tones. Its sunny colour and good durability make it a natural choice for jewellery worn every day.

MINERAL
Quartz
HARDNESS
7 Mohs
BIRTHSTONE
November

Care: Avoid long exposure to strong sunlight; clean with lukewarm water and mild soap.

Ruby

July birthstonepassion and vitality

A rich red stone with an enduring, fiery presence.

Shop Ruby →

Turquoise

December birthstoneprotection and good fortune

An opaque blue-to-green stone with a timeless character.

Shop Turquoise →

Our Gemstone Promise

Natural stones

Our opals, amethysts, garnets, emeralds and other natural gemstones are formed in the earth over thousands of years. No two are exactly alike.

Chosen by eye

Each stone is selected one by one for its colour, brightness and character, and stones for the same piece are matched by hand.

Set by hand

Our settings are cast in 925 sterling silver, plated with 18K gold, and every stone is set by hand.

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