Six Materials. Eight Sizes. Every Dabbing Setup Covered.
Terp pearls do one thing extremely well: they spin with airflow and sweep your concentrate across the full heated surface, cutting waste, evening out temperature, and opening up the flavor your material is actually capable of delivering. The material you choose determines how fast that pearl heats, how long it holds, and how easy it is to clean. We carry all six worth caring about.
Why Every Setup Should Have Them
A spinning pearl turns a flat, static heat surface into an active, self-agitating system. Here is exactly what happens when one drops into your banger or atomizer.
Match Your Pearl to Your Setup
Pearl size determines whether it will spin freely, how much thermal mass it adds, and whether it will stay in your banger during a hit. Use this table to find the right size for your device.
| Size | Pack | Materials Available | Best For | Notes |
|---|---|---|---|---|
| 2mm | 10-pk |
Ruby Zirc SS316 |
Dr. Dabber Switch², Yocan Black Pocket, Lunar Lander, micro atomizers | Smallest option. Spins freely in restricted e-rig chambers. Use multiple pearls. |
| 2.5mm | 10-pk |
Ruby Zirc SS316 |
Switch², Lunar Lander, pen-style atomizers with narrow chambers | Slightly more thermal mass than 2mm. Good for devices with 12–15mm chambers. |
| 3mm | 10-pk Mois: 2-pk |
Ruby Zirc SS316 Moissanite |
Switch², compact e-rigs, small bangers, Puffco-style atomizers | Popular for electric rigs. Moissanite 3mm is a 2-pk due to material cost. |
| 4mm | 2-pk SiC: 2-pk + single |
Ruby Sapphire SiC Moissanite |
Standard bangers, Puffco Peak Pro, small to medium e-rig atomizers | Spins fast, provides good oil coverage. Use 1–2 pearls depending on banger diameter. |
| 5mm | 2-pk SiC: 2-pk + single |
Ruby SiC |
Standard to medium-large bangers, 20–25mm chambers | Balances spin speed with thermal mass. Solid daily driver size for 25mm setups. |
| 6mm | 2-pk SiC: 2-pk + single |
Ruby Sapphire SiC Moissanite |
XL bangers, slurpers, hybrid blenders, large 25–30mm bangers, Dr. Dabber Switch² (single pearl) | Sweet spot for standard 25mm bangers. Also popular in the Switch² as a single pearl for excellent coverage. |
| 8mm | 2-pk SiC: 2-pk + single |
SiC Moissanite |
XL bangers, large slurpers, big-bore hybrid blenders, Switch² (single pearl) | Maximum thermal mass. One pearl fills a large chamber for full-surface coverage. |
Not sure what size fits your specific device? Ask in Discord or the contact page with your device model and we will point you straight.
Which Material Is Right for You?
The material determines how your pearl heats, how long it holds temperature, how it flavors, and how you clean it. Here is the full comparison, plainly written.
| Property | Ruby | Sapphire | SiC | Moissanite | Zirconia | SS316 |
|---|---|---|---|---|---|---|
| Heat-Up Speed | Fast | Fast | Fast | Fastest | Slow | Moderate |
| Heat Retention | Excellent | Excellent | Good+ | Excellent | Good | Moderate |
| Thermal Shock | Caution | Caution | Resistant | Immune | Resistant | Immune |
| ISO Cleaning | Cool First | Cool First | Anytime | Anytime | Cool First | Anytime |
| Flavor Profile | Neutral+ | Neutral+ | Neutral+ | Neutral+ | Neutral | Neutral* |
| Hardness (Mohs) | 9.0 | 9.0 | 9.0–9.5 | 9.25 | 8.5 | 5.5–6.5 |
| Best Use Case | Low-temp flavor, daily driver, widest size range | Same as Ruby, with a blue aesthetic | Mid-tier performance, shock resistant, easy maintenance | Maximum performance, easiest maintenance | Consistent low-temp, e-rigs, small pearls | Budget, beginners, high-volume use |
| Sizes at Dab Hut | 2 / 2.5 / 3 / 4 / 5 / 6mm | 4 / 6mm | 4 / 5 / 6 / 8mm | 3 / 4 / 6 / 8mm | 2 / 2.5 / 3mm | 2 / 2.5 / 3mm |
* SS316 is chemically inert and flavorless at standard dabbing temperatures. At very high temps (above 600°F sustained), some users detect a faint metallic note. Use at normal low-temp ranges and this is a non-issue.
Know Your Material
The right material for your session comes down to how you heat, how you clean, and what you want from the vapor. Here is what each material actually does.
Ruby is lab-grown corundum (Al2O3), the same base material as sapphire but with chromium trace elements that produce its distinctive red color and UV glow. It heats roughly 10x faster than quartz and holds that heat for extended low-temp sessions, giving you a wide dabbing window and consistent vapor from start to finish. The smooth, hard surface (9.0 Mohs) spins cleanly and does not chaz over time.
Let cool first. ISO dunk or dry swab while warm risks thermal shock. Cotton swab after each hit to prevent buildup.
Blue Sapphire is the same lab-grown corundum (Al2O3) as Ruby with iron and titanium trace elements instead of chromium. The result is a deep blue color with identical thermal properties, hardness, and flavor neutrality. If you like the performance profile of Ruby but prefer the look of blue, Sapphire delivers the same experience in a different color. Same care requirements apply.
Same as Ruby. Let cool completely before ISO contact. Dry swab between sessions. Susceptible to thermal shock when hot.
Regular SiC (polycrystalline silicon carbide) sits between Ruby and Moissanite in the performance hierarchy. It heats faster than quartz and retains heat well, but uses a polycrystalline structure (3C-SiC) rather than the single-crystal lattice found in Moissanite. Thermal conductivity falls in the 80 to 120 W/m·K range. Better than Ruby for shock resistance, more affordable than Moissanite, and produces clean, neutral flavor. Available in 2-packs and as individual singles for those who just want to try one.
ISO anytime, torch clean, or dry swab. Very low maintenance. Similar cleaning profile to Moissanite.
Moissanite is single-crystal silicon carbide (6H-SiC), grown atom by atom into a near-perfect crystal lattice. That structure gives it a thermal conductivity of approximately 490 W/m·K, which is roughly 46x faster heat transfer than quartz and around 15x faster than ruby. It also has exceptionally low thermal expansion, meaning it will not crack under rapid temperature changes. Drop it into ISO while hot, torch it, or cycle it rapidly. It handles all of it.
ISO dunk at any temperature, torch clean, or dry swab. The most maintenance-friendly material in the lineup.
Zirconia has lower thermal conductivity than ruby or moissanite, which actually makes it useful in a specific way: it heats slowly, holds that temperature with minimal fluctuation, and releases heat at a controlled, even rate. There are no spikes, no hotspots, and no cracking under any conditions you can produce dabbing. For e-rigs with small chambers and precise temperature control, Zirconia’s slow and steady thermal behavior pairs well with the device’s own temperature management.
ISO dunk (let cool slightly first as a precaution), dry swab, or wipe. No torch cleaning needed or recommended.
SS316 surgical stainless steel is the most durable and lowest-cost option in the lineup. It will not crack, chip, or degrade under any condition you encounter dabbing, and its surface is easy to wipe clean. Thermal conductivity sits between quartz and ruby. Not the fastest, but plenty functional for normal low-temp sessions, especially in the 2 to 3mm sizes where you are using multiple pearls anyway. The go-to choice for beginners, high-volume use, and anyone who prioritizes value and durability.
ISO anytime, wipe with cloth, torch if needed. No special care required.
Every SKU at a Glance
Pack counts are set by size and material. Small sizes (2 to 3mm) ship as 10-packs so you always have enough for multi-pearl setups. 4mm and above ship as 2-packs. SiC 4mm and above are available as both 2-packs and individual singles. Moissanite 3mm ships as a 2-pack due to material cost.
| Size | Ruby | Sapphire | SiC | Moissanite | Zirconia | SS316 |
|---|---|---|---|---|---|---|
| 2mm | 10-pk | Not Available | Not Available | Not Available | 10-pk | 10-pk |
| 2.5mm | 10-pk | Not Available | Not Available | Not Available | 10-pk | 10-pk |
| 3mm | 10-pk | Not Available | Not Available | 2-pk | 10-pk | 10-pk |
| 4mm | 2-pk | 2-pk | 2-pk 1-pk | 2-pk | Not Available | Not Available |
| 5mm | 2-pk | Not Available | 2-pk 1-pk | Not Available | Not Available | Not Available |
| 6mm | 2-pk | 2-pk | 2-pk 1-pk | 2-pk | Not Available | Not Available |
| 8mm | Not Available | Not Available | 2-pk 1-pk | 2-pk | Not Available | Not Available |
Lowest Price. Guaranteed.
We work directly with suppliers to keep every pearl priced at or below what you would pay anywhere else on the internet. If you find a lower price, we match it.
Pair Your Pearls with the Right Setup
Tell us your device model, your set point, and what you are chasing (flavor, clouds, or both) and we will recommend the exact material and size. Discord or contact page, same-day answer.
Veteran-Owned and Operated. We run these pearls in-house. If you have questions about which setup, just ask.
Terp Pearl FAQ
The questions we get most before a pearl order. Discord for anything not covered here.
Which material should I buy if I just want the best performance?
Moissanite if you want the absolute peak performance with zero maintenance headaches. It heats the fastest of any pearl material, transfers heat into your concentrate most efficiently, never cracks from ISO or temperature swings, and can be torch cleaned in seconds. Available in 3mm, 4mm, 6mm, and 8mm.
For the widest size range and excellent performance at a lower price point, Ruby is the answer. It heats around 10x faster than quartz, holds temperature well for extended sessions, and comes in every size from 2mm to 6mm. Just handle it more carefully during cleaning.
If you want something between Ruby and Moissanite, regular SiC is the middle ground. Better heat transfer than Ruby, strong shock resistance, and available in 4mm through 8mm as 2-packs or singles.
What is the difference between regular SiC and Moissanite? They are both silicon carbide.
The crystal structure is different. Regular SiC is polycrystalline (3C-SiC), meaning it is made up of many small crystal grains fused together. Moissanite is single-crystal (6H-SiC), grown atom by atom into one continuous lattice. That single-crystal structure gives Moissanite roughly 4 to 5 times the thermal conductivity of regular SiC. In practice, Moissanite heats faster, transfers heat more aggressively into your concentrate, and has a subtle sparkle under light. Regular SiC is darker, more matte, and sits at a lower price point while still outperforming Ruby and quartz on heat transfer. Both are shock resistant and ISO-safe. If budget matters, start with SiC. If you want the top of the line, go Moissanite.
Is Blue Sapphire different from Ruby in terms of performance?
No. Blue Sapphire and Ruby are both lab-grown corundum (aluminum oxide). The only difference is the trace element that gives them their color: chromium for Ruby’s red, iron and titanium for Sapphire’s blue. Thermal conductivity, hardness, heat retention, flavor neutrality, and cleaning care are all identical. Same thermal shock susceptibility too. Pick whichever color you prefer. We carry Sapphire in 4mm and 6mm at the same price tier as Ruby.
What size pearl does the Dr. Dabber Switch² take?
The Switch² supports a wider range of pearl sizes than most people expect. The small atomizer cup works well with 2mm to 3mm pearls using multiple pearls for full-surface coverage, but a single 6mm or 8mm pearl is also popular and works well in the Switch² chamber. Many users prefer the single large pearl approach because it covers the entire floor of the cup in one piece.
Quick reference: 2 to 3mm = multi-pearl setup, great for flavor-focused sessions. 6mm Ruby, Sapphire, SiC, or Moissanite = single pearl, maximum surface coverage. 8mm SiC or Moissanite = single pearl for the largest possible thermal mass in the chamber.
Why did my Ruby pearl crack?
Thermal shock. Ruby (lab-grown corundum) is susceptible to cracking when subjected to a rapid temperature swing. The most common cause is dropping the pearl into ISO while it is still warm or hot. Let your Ruby and Sapphire pearls cool completely before any liquid contact. Dry swab them between dabs to minimize buildup, and only ISO clean when fully cool. Avoid placing hot corundum pearls on a cold surface as well. If you want to ISO dunk at any temperature, switch to SiC, Moissanite, or SS316.
How many pearls should I use?
For standard 25mm bangers, one pearl is typically the best balance between airflow, spin speed, and heat coverage. Two pearls increase thermal mass but can collide and stall if your airflow is not strong enough. For small e-rig atomizers like the Switch², use two to three small pearls (2 to 3mm) to cover the entire chamber floor. The 10-packs are sized for this use case so you always have enough on hand. If your pearls are stalling or not spinning, try reducing to one pearl first before adjusting your carb cap.
What is the difference between Zirconia and Moissanite? They both look like black or dark pearls.
Very different materials despite a similar dark appearance. Moissanite is single-crystal silicon carbide with one of the highest thermal conductivities of any dabbing material available, roughly 490 W/m·K. Zirconia has low thermal conductivity, around 2 to 3 W/m·K. What that means in practice: Moissanite charges up fast and transfers heat aggressively into your concentrate for rapid, efficient vaporization. Zirconia heats slowly and releases heat slowly, acting more like a thermal buffer that keeps temperature consistent and even. Moissanite is the performance choice. Zirconia is the consistent, never-crack choice for small e-rigs where you want the device’s temperature control to stay in charge.
I found these pearls cheaper somewhere else. Will you match the price?
Yes. We aim to be the lowest price on the internet for every material and size we carry. If you find the same material, same size, same quantity cheaper at another reputable retailer, reach out through the contact page or drop the link in Discord and we will match it. Same-day response. No catch.
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