How to Use Raw Crystals

Raw crystals work the same way polished ones do. What changes is what the piece puts up with, and that comes from the mineral rather than the finish. A raw citrine point takes a pocket for years. A raw aragonite cluster will not.

There is a raw black tourmaline on the shelf here that leaves a scatter of black grit on the wood every time it is set down. A chip came away onto a finger while it was being photographed. Nothing hit it. It just sheds.

Tourmaline is hardness 7, the same number as quartz, and a raw quartz point will ride around in a pocket with a set of keys for a year and come out looking much as it went in. Two raw stones, the same hardness, opposite behaviour. The word raw, on its own, does not tell you much about how careful to be. The mineral tells you a lot, and so does the shape it grew in, and both of those you can see without any special knowledge.

What raw changes about the practice

Almost nothing, and that is the short version. Placement works the same, and so does holding a stone through a few slow breaths, and so does setting an intention on a piece when you first bring it home. Crystal practice does not generally hold that lapidary work adds or subtracts anything, and liking the look of unpolished material is a good enough reason on its own.

What raw does change is the object. A raw piece has surfaces that catch, edges that are still where the rock broke, and often a lump of matrix still attached. It sits differently. There is a desert rose here, a rosette of intergrown gypsum blades about the width of a dinner plate, and the first thing said about it here was that it weighs almost nothing for its size. That is the sort of information a polished piece gives away less easily, and it is a real part of why people buy raw.

The practical consequences follow from the object rather than from any rule about rawness. Raw pieces shed into a fabric pouch and scratch whatever is in there with them. They collect dust in every crevice that a tumble does not have. None of that is fragility. Some raw pieces genuinely are fragile, for a reason worth understanding.

The thing that decides it

Hardness is one property out of several, and on its own it tells you less than the number suggests. GIA separates three: hardness is resistance to scratching, toughness is resistance to breaking and chipping, and stability is resistance to chemicals, heat, humidity and light. A stone can score well on one and badly on another, which is why “hardness is only one factor in determining gem durability” is GIA’s own summary of the point.

The shelf tourmaline is the clean illustration. The Handbook of Mineralogy gives schorl hardness 7, tenacity brittle, cleavage very poor, and lists its habit as prismatic and “also radial, fibrous, and massive”. The Handbook stops there, so the rest of this is our reading of the piece rather than the source’s. A radial or fibrous specimen is not one crystal. It is many crystals grown together, and an aggregate has internal boundaries that a single crystal does not. Every chip the tourmaline sheds is itself hardness 7 material, which is why the number on the page was never going to predict the mess on the shelf.

Once you have seen that, raw pieces sort themselves quickly. A single terminated crystal with clean faces is one solid thing and behaves like one. A bundle, a fan, a fibrous mass or a cluster of small crystals on matrix has internal contacts, and contacts are where an object comes apart. A good deal of handful-sized raw retail material is the second kind, so look at a piece before you put it in a bag.

Aquamarine, citrine, amazonite and aragonite

These four come up more than the rest, and they happen to sit at four different points on the range.

Aquamarine is the one you can treat casually. It is a variety of beryl, hardness 7.5 to 8, which puts it above quartz, and raw aquamarine usually turns up as a hexagonal prism or a broken section of one. Practice puts it with calm speech and the throat, so a desk or a writing table is the conventional placement, and the crystal form is striking enough that it earns the spot visually. Beryl has a poor basal cleavage, so a hard knock across the end of a prism is the one thing to avoid.

Citrine is quartz, hardness 7, with cleavage listed as indiscernible, the property that makes quartz the family you can be careless with. Raw citrine points and small clusters take handling well. In practice citrine sits with confidence and money, and a cluster near a desk or an entry is the usual placement. If you want a raw stone you can pick up several times a day without thinking about it, this is the one in the group.

Amazonite is where the numbers change. It is a colour variety of microcline, a potassium feldspar, hardness 6 to 6.5, and it has two directions of perfect cleavage, and geology.com puts the consequence in jewellery terms: it “can be easily broken in those directions if you bump your ring or bracelet against a hard object.” A raw amazonite block splits along those same flat planes if you drop it. Practice associates it with honest speech, so the placement instinct is the same as aquamarine’s. Keep it on the shelf rather than in a bag.

Aragonite asks the most. It is calcium carbonate, hardness 3.5 to 4, brittle, and it effervesces in acids even cold and dilute, which means vinegar and most descaling products will etch it. The star-shaped Moroccan clusters sold everywhere are radiating bundles of thin prisms, so they are the aggregate case as well as the soft case. Practice puts aragonite with patience and long slow work. Give it a spot where nothing else touches it, dust it with a dry brush, and keep it away from the sink.

Washing, dusting and where they live

The cleaning question is the one that gets over-ruled elsewhere, so here is the short version. Quartz and beryl are fine under a tap. Feldspars are fine briefly but do not enjoy sitting in water, and a raw block with a rough surface holds moisture in its pits. Carbonates like aragonite should not go near acid at all and are better dusted than washed.

For dust, a dry soft paintbrush into the crevices every few weeks does more than any rinse, and it works on everything including the pieces that must stay dry. If a raw piece has been shedding, brush the surface it sits on too, and choose a surface you do not mind marking.

Raw material is better on open display than shut away, which is convenient, because open display is a large part of the appeal in the first place. A piece with its own patch of shelf reads as a specimen. The same piece crowded into a group reads as clutter, and it stops working as anything you notice. If you want to think about placement properly, where to place crystals in your home covers the room-by-room logic.

What raw is better at

Raw wins on information. You can see the crystal faces where the stone grew freely and the fractures where it was broken out, you can often see the matrix it came from, and with practice you can read the habit. A tumble tells you the colour and nothing else. If you are trying to learn what minerals look like in the ground, raw material teaches and polished material does not, and that is the argument for crystal points, spheres, clusters and other shapes being worth telling apart in the first place.

It costs less per gram too, since no lapidary time has gone into it.

Anything you want to carry, wear, hold in a closed hand or keep alongside other stones is better as a tumble or a palm stone, and that is a preference about the object rather than a judgement about the practice. Each of these minerals is described in the Crystalance Mineral Library, composition and growth habit included, and that is the place to look when you want to know what a piece is likely to do before you buy it.

The tourmaline is still on the shelf, and the shelf still gets brushed.