Spinel Deserved Better Than Being Mistaken for Ruby.

Natural Spinel

Spinel spent centuries hiding in plain sight.

Some of the most famous “rubies” in history eventually turned out to be spinel.

That says a lot about the material.

Fine red spinel can stand next to ruby without looking out of place. Pink spinel can be almost electric. Purple can move from soft lavender to deep plum. Blue, gray, violet, orange, and colors somewhere between all of them exist too.

And unlike a lot of gemstones, spinel usually does not need much help.

At Caleb B. Quashen International, we are drawn to spinel because it has strong natural brilliance, great color, good durability, and enough range that the category never feels repetitive.

Our current collection leans heavily toward Sri Lankan material in pink, lavender, purple, red-purple, and mauve tones, often cut in geometric portraits and step cuts that let the color stay open and visible.

Some are delicate.

Some are loud.

None of them look particularly interested in being ruby.

What Is Spinel?

Spinel is its own mineral species.

It is not ruby.

It is not sapphire.

And it is not a lesser version of either one.

For centuries, red spinel and ruby were difficult to distinguish because they can occur in the same deposits and share remarkably similar color.

Modern gemology finally separated them.

Spinel is singly refractive, often very transparent, and can have excellent brilliance when it is cut well.

It also occurs in a much wider range of colors than many people realize.

Red may have made it famous.

Color is what makes the category fun.

The Colors of Spinel

Spinel can occur in red, pink, purple, violet, blue, gray, orange, and combinations between them.

The most commercially prized material tends to include vivid red, strong pink, and saturated blue. Softer lilac and mauve material can have an entirely different appeal. (gia.edu)

We happen to like that quieter end of the spectrum quite a bit.

Lavender.

Dusty pink.

Bubble-gum pink.

Red bleeding into purple.

Mauve that changes slightly as you move the stone.

Those colors work especially well in cuts where you can actually see into the material instead of breaking everything up into constant sparkle.

That is one reason you will see so many portrait and step-cut spinels in our collection.

Sri Lankan Spinel

A large portion of the spinel we currently carry comes from Sri Lanka.

The island is better known to many people for sapphire, but it also produces beautiful spinel in blue, pink, purple, violet, and related tones. Spinel has historically been recovered from gem-bearing gravels across southern Sri Lanka, including the Ratnapura region. (gia.edu)

The Sri Lankan material we work with tends to be especially interesting in the softer pink-purple range.

Some stones lean magenta.

Others go lavender.

Some sit directly between red, pink, and purple and refuse to pick one.

That kind of color is a good match for the way we like to cut.

Open.

Geometric.

A little unconventional.

Why We Use So Many Portrait Cuts

A portrait cut does something completely different from a traditional brilliant cut.

Instead of using a deep pavilion and a large number of facets to create constant scintillation, portrait-style cuts are often shallower and more open.

That lets you see through the stone.

With clean or lightly included spinel, that can be incredibly effective.

The color becomes the focus.

The outline matters more.

And the stone starts behaving almost like a piece of colored glass with much more life inside it.

Our current spinel collection includes geometric portraits, shield cuts, trillions, and squared emerald-style designs because that material lends itself beautifully to them.

We are not trying to make every spinel sparkle in exactly the same way.

Sometimes transparency is the better trick.

Step Cuts & Spinel

Spinel can also work beautifully with step facets.

Long, clean reflections can show off color in a way that a busy brilliant pattern may not.

That is especially true with softer pink, purple, and lavender stones.

A step cut can make those colors feel more architectural.

More deliberate.

Less sugary.

That contrast is part of why we like combining unusual spinel colors with geometric outlines.

The stone already has personality.

The cut should give it structure.

Untreated Spinel

One of the advantages of spinel is that treatment has historically been much less common than it is with many other colored gemstones.

GIA notes that spinel is rarely treated, although heat treatment, fracture filling, and diffusion treatments do exist in the market. (gia.edu)

Many of the spinels currently in our collection are untreated, including the Sri Lankan stones featured in our portrait-cut inventory.

We still disclose treatment stone by stone.

We do not assume that because spinel is usually untreated, every spinel must be.

If treatment is known, it belongs on the listing.

Blue Spinel & Cobalt

Blue spinel deserves its own conversation.

Fine blue material can range from grayish blue to vivid saturated blue, and certain highly prized stones owe part of their color to cobalt.

Vietnam, Sri Lanka, Tanzania, Myanmar, and other regions have all produced blue spinel. Vietnam's Luc Yen district is particularly famous for vivid cobalt-bearing material. (gia.edu)

But “cobalt” should not be used casually as a marketing adjective.

A vivid blue spinel may contain cobalt, iron, or a combination of coloring agents, and laboratory testing is the proper way to characterize unusual blue material when that distinction matters.

The color still has to be good.

The chemistry does not rescue a boring stone.

Spinel from Tanzania & Vietnam

Sri Lanka represents a large part of our current spinel inventory, but spinel is produced in several important gem regions.

Tanzania has produced red, pink, purple, and blue material, including notable discoveries that attracted serious collector interest.

Vietnam's Luc Yen region is known for red, pink, violet, and especially vivid blue spinel.

Other important sources include Myanmar, Tajikistan, Pakistan, and Madagascar. (gia.edu)

As our inventory changes, so will the origins represented here.

We do not buy a stone simply because the locality is famous.

Origin gets our attention.

The stone decides the rest.

Spinel Can Be Exceptionally Clean

Fine spinel can be remarkably transparent.

That clarity is one reason it can have such strong brilliance.

It also makes the material ideal for cuts that depend on clean windows, long facets, and open areas of color.

Of course, spinel can contain inclusions too.

Crystals.

Fingerprints.

Fractures.

Needles.

Growth features.

As always, the question is not simply whether something is inside the gemstone.

The question is whether it hurts the stone, adds something to it, or becomes part of what makes that particular piece interesting.

Cutting Spinel

Spinel is one of those materials that gives a cutter options.

Clean rough may work beautifully in complex precision cuts.

Strong color can handle simpler designs.

Lighter material may benefit from a larger face-up area.

A thin piece of rough might become a portrait cut rather than being sacrificed just to create depth.

Sometimes maximizing carat weight makes sense.

Sometimes keeping the unusual outline is more important.

Sometimes the right choice is removing more rough to open the color.

The material tells you what is available.

The cutter has to decide which version is worth keeping.

Spinel for Custom Jewelry

Spinel is a very practical gemstone for custom jewelry.

It ranks about 8 on the Mohs hardness scale and has good toughness, making it durable enough for rings and other jewelry intended for regular wear. (gia.edu)

That matters because spinel gives you a lot of the things people want in a center stone:

Color.

Brilliance.

Durability.

Rarity.

And choices beyond the usual sapphire, ruby, or diamond.

The unusual cuts in our collection make it especially well suited for one-of-a-kind pieces.

A shield already gives the designer a direction.

A portrait-cut trillion changes the entire architecture of a ring.

A pink-purple geometric stone may need almost nothing around it.

Start with the spinel.

Then let the design respond to the shape.

Why We Keep Buying It

Spinel is one of those gemstones that makes more sense the more of it you see.

At first, you notice the color.

Then you notice how clean it can be.

Then how much brilliance it has.

Then you realize how many colors you have never seen anyone associate with spinel.

Pink.

Lavender.

Steel blue.

Violet.

Red.

Gray.

And all the awkward colors in between that are usually the most fun to describe.

It spent long enough being mistaken for something else.

We are much more interested in what spinel looks like when you let it be itself.

Spinel Questions

Is spinel the same thing as ruby?

No.

Ruby is red corundum. Spinel is a completely different mineral.

Historically, red spinel was frequently mistaken for ruby because the two gems can occur together and may look very similar.

What colors does natural spinel come in?

Natural spinel occurs in red, pink, purple, violet, blue, gray, orange, and other intermediate colors.

Red, vivid pink, and saturated blue are among the most highly valued colors in the traditional market.

Is spinel usually treated?

Most spinel is untreated, and treatment is relatively uncommon compared with many other colored gemstones.

Heat treatment, fracture filling, and diffusion treatments do exist, however, so treatment should still be considered individually.

Where does spinel come from?

Important spinel sources include Sri Lanka, Vietnam, Tanzania, Myanmar, Tajikistan, Pakistan, and Madagascar.

Our current collection includes a significant amount of untreated Sri Lankan material.

What is a portrait-cut spinel?

A portrait cut is generally a shallow, open cutting style that emphasizes transparency, color, and outline rather than maximizing brilliant-style sparkle.

We use portrait and step-cut designs extensively in our current spinel collection because they work especially well with clean pink, purple, and lavender material.

What is cobalt blue spinel?

Some vivid blue spinels owe part of their color to trace cobalt.

Fine saturated blue material can be rare and highly valued, but cobalt content and origin are properly evaluated through gemological testing rather than appearance alone.

Is spinel good for an engagement ring?

Yes.

Spinel ranks about 8 on the Mohs hardness scale and has good toughness, making it a strong option for engagement rings and other jewelry intended for regular wear.

As with any natural gemstone, individual fractures and inclusions should still be considered.

Is spinel an August birthstone?

Yes.

Spinel is one of the recognized August birthstones, along with peridot.

We just think describing it only as a birthstone misses most of what makes it interesting.

Can CBQ source a specific spinel?

Yes.

If you are looking for a particular color, origin, size, cut, treatment status, or something unusual like a portrait cut or cobalt-blue stone, contact us and tell us what you are trying to find.