Untreated Colombian Emerald 0.45 ct Emerald Cut 6x4.5 mm – No Oil, Loose

Looking for a real emerald, exactly as nature made it? Almost every emerald on the market is oiled or resin-filled to hide its natural inclusions. This one isn't. It's a natural Colombian emerald in the classic emerald cut, with no oil, no resin and no treatment of any kind, and a vivid, saturated green. At 6.0 × 4.5 mm, it's just right for a dainty solitaire ring or a delicate pendant, and it makes a meaningful May birthday gift or a first fine gemstone.

• Natural. Untreated. Colombian green. Made to be remembered.
• Natural Colombian emerald, 0.45 ct, classic emerald cut
• Untreated: no oil, no resin, no treatment of any kind
• Vivid, saturated green, transparent with natural jardin
• 6.0 × 4.5 mm, just right for a dainty solitaire ring or a delicate pendant
• A loose natural emerald from Colombia, sold unmounted. There is only one of this stone.

Why "no oil" matters

Oiling is the standard, accepted treatment for emerald, and it's used on almost every stone sold. An untreated emerald shows its true clarity and colour, with nothing added and nothing to wear away over time.

The emerald cut

Long, parallel step facets and cut corners were designed for this gemstone. Instead of scattered sparkle, the colour pools in the stone and flashes in calm, geometric planes. At 2.5 mm deep, it sits low and looks generous face-up for its weight.

Design ideas

• A dainty solitaire ring in a 6 × 4 or 6 × 5 mm bezel or four-prong setting
• A delicate pendant on a fine chain
• A stacking ring or pinky ring
• Yellow gold warms the green, and white gold gives a crisp contrast
• Emerald is softer than sapphire, so a bezel or a protective prong setting is a good choice for everyday wear

A gemstone for him: the men's signet ring

At Roho Jewels, we believe men deserve beautiful gemstones too. A natural Colombian emerald 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 6 × 4.5 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 2.5 mm deep, so ask your jeweler for a signet head at least 3.5 mm deep
• Metal: rich in yellow gold, sharp in white gold or platinum, rugged in oxidised sterling silver
• Wear: Mohs 7.5–8. A flush or bezel setting protects the edges, making it ideal for a dress signet or careful everyday wear
• Perfect for: husbands, fathers, grooms, graduates, milestone birthdays, or a signet he buys for himself

Birthstone meaning

Emerald is the birthstone for May and the traditional gemstone for 20th and 35th wedding anniversaries, long a symbol of love, renewal and loyalty.

Perfect for

May Birthdays · Dainty Solitaire Rings · Pendants · Christmas · 20th & 35th Anniversaries · First Fine Gemstone · Jewelry Designers · 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, 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.