Unheated Ceylon Blue Sapphire 10.01 ct Cushion – Natural Loose (Neelam)

Looking for something truly rare? What you see in the photos is exactly what this stone looks like in person: a vivid, electric cornflower blue with exceptional transparency and strong light return. No filter, no enhancement. At 10 carats, unheated, from Ceylon (Sri Lanka), this stone belongs to the rarest category of blue sapphire available today. It's ideal for a one-of-a-kind engagement ring, a statement ring or pendant, a collection, or a Jyotish Neelam.

• Natural. Untreated. Rare. Made to be remembered.
• A loose natural blue sapphire from Sri Lanka (Ceylon), 10.01 ct, cushion cut, sold unmounted
• No heat and no enhancement of any kind, so its colour is 100% natural, exactly as the earth produced it
• Vivid, electric cornflower blue with exceptional transparency and strong light return
• An engagement ring center stone and a Jyotish Neelam

Why it stands out

• No heat and no enhancement, so the vivid colour is entirely natural
• 10 carat size class, which is rare in unheated material at this colour quality
• A 12.3 × 9.7 mm face, with a similar footprint on the finger to a large oval diamond
• Vivid cornflower blue, one of the most desirable colours in sapphire
• Ceylon origin, one of the world's most prestigious sources for blue sapphire

Why untreated matters

The vast majority of blue sapphires sold worldwide have been heat-treated. Untreated stones are the gold standard, because the colour you see is entirely natural. At 10 carats with vivid cornflower colour, an unheated Ceylon sapphire is a stone that holds its place in any serious collection.

For the engagement ring buyer

This stone is for the couple who wants something different: a non-diamond engagement ring with a bold, unforgettable colour. Its 12.3 × 9.7 mm face gives dramatic presence on the finger. It's ideal for a bezel, halo or three-stone design in platinum or 18K gold, and it also makes a striking men's ring or statement pendant.

A gemstone for him: the men's signet ring

At Roho Jewels, we believe men deserve beautiful gemstones too. A natural unheated Ceylon 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 12.3 × 9.7 mm, this stone suits a signet face of about 16–19 mm (most men choose a face of about 15–18 mm), great on the ring or middle finger
• 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 7.6 mm deep, so ask your jeweler for a signet head at least 8.6 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: husbands, fathers, grooms, graduates, milestone birthdays, or a signet he buys for himself

For the Jyotish & Vedic astrology buyer

In Vedic astrology, blue sapphire is Neelam, the gemstone of Saturn (Shani) and one of the Navaratna stones. It's traditionally worn to strengthen Saturn in the birth chart and is associated with discipline, focus, career and karmic resolution. This stone meets the traditional requirements for Neelam: natural and earth-mined, untreated with no heat, of Ceylon origin, and a substantial 10.01 ct weight. Note: Saturn stones are traditionally worn only after a proper astrological consultation. Please consult a qualified Jyotish practitioner before wearing.

Birthstone meaning

Sapphire is the birthstone for September and has long been a symbol of wisdom, loyalty and lasting love.

Perfect for

Christmas Gifts · Engagement Rings · Men's Rings · Statement Pendants · Jyotish Neelam · Anniversary Gifts · September Birthdays · Collectors · Heirloom Pieces · Men's Signet Rings · Gifts for Him

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, emeralds and pearls, never synthetics. When a stone is untreated, we say so clearly, because you deserve to know exactly what you're buying. Our goal is simple: real gemstones, real craftsmanship and real value, without traditional retail prices.