Madagascar Royal Blue Sapphire 1.06 ct Square Cushion – Natural Loose

Looking for a deep royal blue in a shape that stands out? This natural Madagascar sapphire has a rich, velvety royal blue colour and stays bright and transparent rather than going dark. It's cut as a square cushion with long step facets, a crisp, geometric shape you rarely see in sapphire. Just over a carat, it makes a striking engagement ring centre stone, or a men's signet or bezel ring with real presence.

• Natural. Velvety. Royal blue. Made to be remembered.
• Natural Madagascar blue sapphire, 1.06 ct
• Square cushion, step cut, 5.4 × 5.4 × 3.6 mm
• Velvety royal blue, highly saturated, bright and transparent
• Standard heat only, the traditional and widely accepted treatment for sapphires
• A loose natural blue sapphire from Madagascar, sold unmounted. There is only one of this stone.

The colour

A fine royal blue needs three things: strong saturation with no grey, a deep tone that doesn't turn black indoors, and a soft, velvety look. This stone has all three, so the blue glows rather than sitting flat.

The square step cut

Long, parallel facets give calm, mirror-like flashes, and the colour pools in the centre of the stone. The square outline is clean and architectural, ideal for modern and Art Deco designs.

For the engagement ring buyer

• Just over 1 carat in a distinctive square shape
• 5.4 mm square, which fits standard 5 to 5.5 mm square settings
• Beautiful in a four-corner prong solitaire, a halo or a bezel
• Mohs 9 hardness, made for everyday wear

A gemstone for him: the men's signet ring

At Roho Jewels, we believe men deserve beautiful gemstones too. A natural royal blue sapphire set into a signet ring is a bold, personal alternative to a plain metal signet: one-of-a-kind, full of character, and a ring he'll wear for decades and one day pass down.

• Signet face: at 5.4 × 5.4 mm, this stone suits a signet face of about 9–12 mm, a classic small signet or pinky ring
• Setting: flush (gypsy), bezel or half-bezel keeps it low and smooth, with no claws to catch on sleeves or gloves
• Depth: the stone is 3.6 mm deep, so ask your jeweler for a signet head at least 4.6 mm deep
• Metal: rich in yellow gold, sharp in white gold or platinum, rugged in oxidised sterling silver
• Wear: Mohs 9, second only to diamond, so it is tough enough for a ring worn every day
• Perfect for: everyday wear, a wedding day, a graduation, a milestone birthday, or simply a signet he chooses for himself

Why Madagascar

Madagascar is one of the world's most important sapphire sources, known for rich, saturated blues.

Birthstone meaning

Sapphire is the birthstone for September and the traditional gemstone for 5th and 45th wedding anniversaries, long a symbol of loyalty, wisdom and sincerity.

Perfect for

A striking centre stone for your own engagement ring, or a men's signet or bezel ring with real presence. And a natural choice if September is your birth month or you're marking a 5th or 45th anniversary.

About Roho Jewels

At Roho Jewels, everything begins with the stone. Every natural gemstone we offer is hand-selected in our Toronto studio. These are real, earth-mined sapphires, rubies and emeralds, and genuine pearls, never synthetics, and every stone is described honestly so you know exactly what you're buying. Our goal is simple: real gemstones, real craftsmanship and real value, without traditional retail prices.