Summary: The metaphor of an opal comes to mind in relation to analyzing cultures, perhaps because of my own backstory in jewelry, my love of colors, and multiculturalism. (And yes, they do somehow all fit together!) This post shares some of that jewelry background, as well as a few technical aspects of opals and why I think they better capture the realities of a postmodern world than do diamonds.
Gems of Observation
My father was a watchmaker and a jeweler. After World War II, he used the G.I. Bill to get training at the watchmaker’s school in Elgin, Illinois. When I was young, I sometimes got to watch my Dad at work, manipulating all those teeny-tiny tools with precision while wearing a “loop” magnifier lens atop his glasses. It was fascinating – but you had to stay quiet as possible so as not to disturb the delicate work being done!
And so, I’ve always been intrigued by old-fashioned mechanical watches and clocks, as well as by all kinds of precious and semi-precious gems and the metals for their settings. I saw a lot of them over the years. For instance, I’ve seen some diamonds where the flat tabletop part was almost as big as a dime! And occasionally, Dad would have a marquis (football-shaped) diamond, or a rare yellow or pink diamond. (Actually, my favorites for diamonds are those in the brown color range, maybe because they remind me of coffee and chocolate?)
One of my favorite memories is of Dad showing us a special-order diamond. He had a sort of ritual he did when he brought it out. First he’d set down a small piece of black velvet on the table top, and gingerly brush off any dust. Then he’d reach into his suitcoat pocket, pull out a tiny manila envelope, and open its flap. He’d tweak out the inner tissue-paper wrap, and carefully undo it. Obviously, it wasn’t that the gem was fragile. It’s just that there’s no reason to rush the joyful experience of seeing a really great diamond! With the tissue opened, he’d slant the edge of the paper onto the velvet and tap gently until the gem came tumbling out. He’d flip the diamond with the tabletop part upward, and center it on the black background with a pair of special jeweler’s tweezers – a kind with long, thin tongs.
That was our cue. Everyone would lean inward to catch a glance of the glints of light that reflected off the mirror-like surfaces of the side facets. Sooner or later, you’d see each person turn this way or that, sort of bouncing around like bobble-head dolls in slow motion, searching for that one just-right position where you could catch the best view of the diamond’s brilliance.
Ahh, yes! It doesn’t matter how often you’ve seen gorgeous diamonds before. There’s simply something magnetic about its majestic beauty that draws you in to those brilliant flashes of rainbow-sliced light! Not a bad destiny for a little chunk of coal that’s endured tons and tons of pressure during its lifespan.

My father didn’t have quite the same routine for other precious or semi-precious stones like emeralds, rubies, sapphires, opals, or garnets. We’d still get to see them, but he’d display them in a way that made sense for their unique qualities. Usually these gemstones were already mounted into ring settings, so he’d pull the ring out of his tray full of samples, and have someone wear it. Naturally, the ring model would turn it this way and that, so all could see this creation from multiple angles.
Diamonds,Opals , and Some Intriguing Differences
Seeing a high-quality opal just wasn’t the same as seeing a similarly special diamond, but I found it equally fascinating. And in fact, I’ve come to like the complexity of opals far more than the clarity of diamonds. I find the natural contrasts between the two different stones to hold a lot of analogies for the way things are now in the world, versus the way they used to be. Let me share some of those – but first, I’ll need to give a bit of technical background so those comparisons make sense.
Diamonds have a cubic crystalline structure made out of carbon. That means a solid-state network of molecules creates the sturdy structure of diamonds. It’s as if layer after layer of the same cube shapes stacks upon each other in a pattern that creates crystals. As best I can illustrate it, think of this as if you had a bucket full of six-sided dice that were just thrown into it any which way. In a perfect world, if you jiggled the bucket back and forth, eventually all the dice cubes would fall into a uniform pattern with the cubes lined up side by side, end to end, row upon row, layer upon layer. That settling out is similar to what a lump of coal goes through on its way to becoming a diamond, only the tons of constant pressure caused by the earth above it push the carbon molecules into alignment, turning it from black coal to a clear diamond. Any flaws are places where the carbon doesn’t fully compact and so a black spot shows in the structure, or there is a crack or weak point.
In fact, this compacted structure is what makes diamond the hardest mineral on earth. It is anywhere from 10 to 150 times harder than versions of the next hardest mineral, corundum (which is what rubies and sapphires are formed from). Diamonds are generally faceted (cut at angles) in various patterns and the facets are then polished to be like tiny mirrors that reflect light. That’s the way to maximize their strengths as a gemstone. Usually, the more faces a diamond has, the more “brilliance” it gives in flashing back reflected light. Also, trace elements may give the diamond a distinct color instead of it being clear. Even then, faceting and polishing still bring out a lively, multicolored sparkle.
Meanwhile, opals are pretty much the opposite of diamonds. They do not have a crystalline structure. Actually, opals are made of compacted molecules of silicon dioxide – the same compound as in glass – plus water. That means they are in a “vitreous” (i.e., liquid) state. If you’ve ever been in a very old house with its original glass windows, you’ll notice they look sort of shimmery and uneven. That’s because glass is actually a very slow-moving liquid compound. (Which is something I didn’t know until I stayed with my friends, the Thames family in Dallas, and they pointed out the waviness in the original glass windows of their 1920s-era home.)
The opal’s not-so-stable internal structure and its water content also contribute to making it far more fragile than a diamond. So opals generally are cut and polished smooth into rounded “cabochons” rather than cut and polished with flat facets and “table top” as are diamonds. If you try to facet an opal, it’s likely to break, if not completely shatter. And since the water can evaporate and the jewel become brittle, it’s recommend that opals be soaked occasionally to keep the water content at the appropriate level.
So, if you can’t facet an opal and polish the flat surfaces into tiny mirrors, why does the opal still have such brilliant play of colors and light? The best way I’ve found so far to illustrate it is this: It’s like an opal is a conglomeration of clusters of microscopic glass beads, immersed in a water-filled glass aquarium. Beads of similar size tend to cluster together, and as the light hits these clusters of specific-sized spheres, it diffracts (bends) around them in characteristic ways. Each color patch is characteristic for the specific size of glass beads in that molecule cluster. The light shows up as violet to blue for the small spheres, green to yellow for medium-sized spheres, and orange to red for the larger spheres. Mix and match clusters of different sized glass beads, and you get a more vibrant interplay of colors.

But the noble opal is also “context sensitive.” View it from another angle, and the colorization will change in this or that patch, right before your eyes – creating that sort of shimmering rainbow iridescence that’s so distinctive that it’s been given its own term: opalescence. It is fiery and bold in its own eye-teasing way, just as the lightning-flash brilliance of a diamond catches our eye in a different way.
Which to prefer when each has its own appeal? To me, this internal diversity of the opal and the resulting play of colors is much more “cool” than the diamond, where every facet is designed to be uniform, and the glints of light are splashy, but kind of all look the same to me. And that realization is where I began to shift from the physical realities inherent in opals versus diamonds, to the spiritual analogies therein.
And … Some “So What’s” of the Differences
Over the years, I’ve heard a number of illustrations for theology around the idea that God is like a diamond who has perfect character that reflects outward, or that we are like diamonds who reflect God’s glory. But, over time, I’ve come to appreciate the opal as better capturing the essence of the theological concepts of God’s character and our reflections in His image. The diamond is far more uniform; the opal has greater diversity. Diamonds come in many colors of the spectrum, from blacks (yes, really!) and browns, to beige and yellows, to pinks and blues. But each kind is translucent (clear). Meanwhile, the background colors for opals typically range from milky white to grey, blue-grey, and near-black. But those many patches of foreground colors shine like micro-neon lights, regardless of their backdrop. Maybe it’s just me, but the complexity in opals says more about God’s character and our “multifaceted” reflections of Him than does the clarity in diamonds.
Also, I think there is a metaphor to explore between diamonds as representing the traditional/modernist mindset, and the opal as the holistic/”emerging era” mindset. The modern has been about precise lines, hard edges, and overall uniformity. Meanwhile, the emerging era is more about irregular patches, interconnecting boundaries, and overall diversity.


And the fact that the opal’s spheres are made of the same substance, regardless of size, draws me to opals as a spiritual metaphor for disciples and cultures. To me, the different scales of the same substance (glass) represent the concept of fractals; there is a discernible pattern or process at work here underneath what looks like chaos. Specifically, the patterns that apply to the smallest of spheres also apply to the largest – light bends through them in particular ways, even when the results come out as different colors. So, it’s the same though different. There is both continuity and discontinuity, stability and change. Ah-ha! A paradox! Which makes the opal quite friendly toward the world as it’s unfolding … don’t you think?
Similarly, even in the midst of our diversity as disciples, where it may appear there is no bond of commonalities, there is indeed. We have humanity as common ground, even when we may differ in gender, race, learning styles, etc.
Okay, so perhaps I overstretched the analogy at this point. But a little confusion now can be helpful for eventual learning later. And the opal will pop up multiple times during our explorations of The Opal Systems and its components, so we’ll have a chance to revisit this again. And, speaking of components, the next post in our executive summary series, RD1-3, offers a slightly more technical overview of the five components in The Opal Systems: theoretical model, assessment tools, training system, simulation game, and immersion learning opportunities.
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