Solutions and careTank side$999
Bench instruments for jewelry
Precision instruments built for jewelry benches
We machine ultrasonic tanks, grind triplet loupes, wind transducers, and program electronic metal testers. Every tool in our catalog is engineered for daily use at the bench, pawn counter, and sorting tray.
Explore catalogCheck a stone first
30 instruments • 5 benches • 4,774 owner ratings
Hand-ground triplet lenses
Our optical glass elements are bonded to correct spherical aberration and color fringing across the field.
Tuned piezoceramic transducers
We wind and mount our own ultrasonic elements to produce uniform cavitation throughout the stainless tank.
Custom formulated chemistry
We blend cleaning concentrates to lift rouge and tripoli without clouding delicate mountings.
Solid calibration weights
Scales feature stainless steel load cells calibrated with precision mass standards for consistent readings.
What are you working on today?
Instruments by category
Five core bench families
Browse thirty precision tools engineered to clean, weigh, inspect, and test precious metals and gems.
All five benchesEssential bench instruments
Jewelers and appraisers rely on these core tools for dependable identification and daily care.
Solutions and careTank side
Tanks and steamersBench top$12995
ScalesWeighing stationMade to order, our partner gives a date at checkout
$3595
Solutions and careTank side$2195
Tanks and steamersBench topUltraSpa Ultrasonic Jewelry Cleaner & Steamer
- Tank
- 1 pint
- Steam
- 50 psi
- Frequency
- 42,000 waves per second
$24995
TestersIntake counterTesterossa Diamond Tester
- Separates
- Diamond, moissanite, white sapphire
- Probe
- Retractable tip
- Also has
- UV fluorescence check
$28995
Solutions and careTank side$999
TestersIntake counterUltraTester 3+ Diamond Tester
- Separates
- Diamond, moissanite, white sapphire
- Probe
- Retractable tip
- Also has
- UV fluorescence check
$24995
Acoustic cleaning
Ultrasonic tanks and dry steam
Heated transducers dislodge polishing compound from deep under gallery wire, followed by pressurized dry steam to clear residue.
View cleanersMetal verificationElectronic karat and gem testing
Handheld probes test electrical and thermal conductivity to verify gold alloys and distinguish diamonds from synthetic moissanite.
View testersRecent engineering updates
Refined sensor arrays and upgraded optics bring greater clarity and speed to your bench.
ScalesWeighing stationMade to order, our partner gives a date at checkout
$3595
Tanks and steamersBench topMade to order, our partner gives a date at checkout
$44595
TestersIntake counterPro-D 3 Diamond Tester
- Separates
- Diamond and white sapphire
- Probe
- Retractable tip
- Also has
- UV fluorescence check
Made to order, our partner gives a date at checkout
$18995
TestersIntake counterAuracle Pen Probe for Analyzer and PRO
- Also reads
- Platinum
- Fits
- AuRACLE Analyzer and AuRACLE PRO
- Part
- Plug and play pen probe
Made to order, our partner gives a date at checkout
$2995
Bench performance metrics
Engineered specifications built to meet daily demands across busy jewelry workshops.
30instruments on the bench
5benches to work from
4,774owner ratings behind them
4.3 / 5averaged across our listings
Solid brass housings
Loupe frames and test probes are turned from raw metal stock to resist bench drops, solvent spills, and heavy wear over years of trade use.
Direct thermal sensing
Our gem probes measure heat dissipation at the tip within seconds, providing immediate feedback on loose or mounted stones across the sorting tray.
Matched concentrate blends
We balance surfactant levels in our solutions to soften buffing wax quickly while rinsing clean without leaving an oily film on polished mountings.
How we build instruments
Optical alignment
Lenses are matched, cemented, and seated into blackened brass barrels to eliminate stray reflection and center distortion.
Sensor calibration
Electronic conductivity circuits undergo individual curve trimming against known gold alloys and synthetic diamond references.
Cavitation mapping
Ultrasonic basins are tested with foil sheets to ensure sweep frequencies eliminate dead zones across the entire liquid volume.
Instrument specifications guide
| Bench | What the number is | Range we cover |
|---|---|---|
| Tanks and steamers | Tank volume and steam pressure | 1 pint • 3 quart • 50 psi of dry steam |
| Scales | Capacity against readability | 100 ct up to 6000 g • steps of 0.005 ct to 0.1 g |
| Testers | What the probe separates | Diamond against moissanite and white sapphire • 6k to 24k on gold, plus platinum |
| Loupes | Power and lens build | 10x • 10x to 30x |
| Solutions and care | How much solution it makes | 1 quart and 1 gallon concentrate • premeasured packets • cloths, wands and baskets |
Bench spotlight
Jewelry Steam Cleaner
The dual-frequency ultrasonic cleaner combines sweeping acoustic waves with built-in heating elements. Jewelers remove caked rouge from behind ring galleries without scratching delicate high-polish metal surfaces.
- Steam
- 50 psi
- Light
- Blue LED over the tank
$129954.1624
Bench rules
- Clean probe tips with plain paper before touching unknown gemstones or rings.
- Draft shields must remain closed during all delicate carat weight measurements.
- Change ultrasonic cleaning fluid daily to maintain peak acoustic wave propagation.
- Verify electronic gold readings on unplated base metal using light filing.
Bench errors
- Never submerge emeralds, pearls, or fracture-filled stones in heated ultrasonic fluid.
- Do not drop heavy cast pieces directly onto bare scale platforms.
- Never wipe optical loupe glass with coarse bench aprons or tissues.
- Do not leave testing probes powered on between grading individual stones.
Cleaning method selection guide
Different gemstones require specific cleaning methods to prevent damage. Use this guide to determine whether your piece requires ultrasonic cavitation, steam pressure, or hand brushing.
All 24 entries| Piece | Ultrasonic | Steam | By hand | Why |
|---|---|---|---|---|
| Diamond, clean and well set | Yes | Yes | Yes | A sound diamond takes anything. The risk is the setting, not the stone. |
| Diamond with a visible feather | No | Care | Yes | Cavitation finds the fracture and opens it. Steam can too if the piece is cold. |
| Fracture filled or clarity enhanced diamond | No | No | Yes | The filler is glass. Heat and cavitation both drive it out. |
| Ruby and sapphire, untreated | Yes | Yes | Yes | Corundum is hard and takes a tank well. |
| Ruby with glass filling | No | No | Yes | Common in low cost goods. The filling will not survive either machine. |
| Emerald | No | No | Yes | Almost every emerald is oiled or resin treated. A tank strips it and the stone goes cloudy. |
| Opal | No | No | Care | Porous and full of water. Heat and vibration both crack it. Wipe only. |
| Pearl and mother of pearl | No | No | Care | Nacre is layered and glued to a bead. Damp cloth, nothing more. |
| Turquoise, coral, amber, jet | No | No | Care | Porous or organic. They absorb the solution and stain. |
| Tanzanite | No | No | Yes | Perfect cleavage. It splits along a plane and vibration is exactly the wrong input. |
Scale capacity and readability
Find the right scale for your bench needs. This chart maps total pan capacity against resolution for carat sorting, scrap gold weighing, and casting pours.
Every scale we makePlatinum PCT101reads to 0.005 ctPlatinum PCT251reads to 0.005 ctPlatinum XP500reads to 0.01 gPlatinum PRO501VXPreads to 0.01 gPlatinum V600Mreads to 0.1 gPlatinum MP601 Jewelry Scalereads to 0.1 gPlatinum PRO1001Vreads to 0.1 gPlatinum PRO1601reads to 0.1 gPlatinum PRO6000reads to 0.1 g
Bars are drawn to a common scale in grams, so a 100 ct carat pan and a 6000 g bench pan sit on the same axis. Capacity is how much it holds. Readability is the smallest step it will show, and the two are not related.
Loupe magnification and resolution
Select the correct focal power for inspection. Understand how ten, twenty, and thirty times magnification affect field of view and focal depth at the bench.
Curated instrument setups
Three recommended bench configurations designed for specific workloads, testing demands, and daily cleaning routines.
Collectors caring for fine jewelry at home
Personal care bench kit
We build this setup so you can inspect stones with a 10x loupe, weigh pieces on a digital scale, and lift grime using our cleaning solution and specialized wand.
Repair benches testing and buying scrap metal
Intake and valuation kit
We supply this bench station to help you verify gold alloys with our electronic analyzer and pen probe, confirm stones with a diamond tester, and record inventory on a precision scale.
Retail counters cleaning customer jewelry all day
Counter restoration cleaning kit
We make this setup so you can prepare gallons of concentrate for your ultrasonic bath, blast grime with a steam cleaner, protect stones in a saver basket, and verify settings under a microscope.
Testing decision pathway
Identify the proper electronic instrument based on the material question in front of you, from verifying yellow gold karats to separating moissanite from diamond.
Is this stone a diamond?
A thermal and electrical probe separates diamond from moissanite and white sapphire in seconds.
TestersWhat karat is this metal?An electronic tester reads a karat band off a clean spot of gold or platinum.
TestersWhat does it weigh?Carat models resolve five thousandths of a carat, gram models carry up to six kilograms.
ScalesAre the prongs sound?A ten power triplet shows a lifted prong before the stone leaves with it.
LoupesHow do I get the film off?A tank shakes a whole basket at once, a steamer puts a jet where a brush cannot go.
Tanks and steamersWhat goes in the tank?Non ammoniated concentrate, premeasured packets, and a basket for anything loose.
Solutions and careBench measurement terms
- Carat
- A standard unit of mass equal to one fifth of a gram, used strictly for weighing loose gemstones and pearls.
- Karat
- A measure of gold purity out of twenty-four parts, indicating the proportion of pure gold alloyed with base metals.
- Point
- A fractional weight unit equal to one hundredth of a carat, used to record small stone sizes accurately.
- Grain
- A traditional mass increment equal to roughly sixty-five milligrams, commonly referenced in historic pearl and precious metal trade.
Engineered for trade professionals
GemOro builds rugged tools for the people who evaluate, clean, and fabricate fine jewelry every day. We design our instruments to withstand shop chemicals, bench debris, and continuous counter handling. Reliable readings and clean mountings remain our sole manufacturing focus.
Bench equipment for jewelry makers and gemologists
GemOro manufactures bench tools used by jewelry fabricators, diamond appraisers, scrap buyers, and precision horologists worldwide. Our product line includes high-frequency ultrasonic tanks, pressurized steam units, electronic karat testers, and thermal gem probes. We grind our own optical glass for triplet loupes and calibrate our digital carat scales with standard test masses. Jewelers trust these rugged instruments for day-to-day evaluation and cleaning.
Selecting the right testing device or cleaning machine protects delicate gem settings and ensures accurate inventory tracking. Electronic probes verify electrical conductivity on white gold, yellow gold, and platinum scrap, while optical loupes expose inclusions and surface blemishes under corrected lighting. Authorized trade supply distributors carry the full GemOro catalog, providing repair shops and retail storefronts with dependable workshop hardware.
| Tanks and steamers | The machines that do the work: ultrasonic tanks that shake film off a whole basket at once, and boilers that put a jet of steam exactly where a brush cannot reach. |
|---|---|
| Solutions and care | What goes in the tank and what happens after it comes out. |
| Scales | Two numbers matter on a scale and they are not the same one. |
| Testers | A tester answers one question quickly: is this what it claims to be. |
| Loupes | Nothing on this list is a guess once you have looked. |
| Least expensive instrument | $6.95 |
|---|---|
| Most expensive instrument | $499.95 |
| Instruments under $50 | 16 |
| Instruments over $200 | 6 |
| Distinct listings behind them | 26 |
- A standard metric carat equals exactly zero point two zero grams.
- Piezoceramic transducers generate microscopic scrub bubbles through high-frequency acoustic cavitation.
- Triplet lenses use three bonded elements to eliminate color fringing distortion.
- Electronic gold probes evaluate surface conductivity across common jewelry alloy ranges.
- Steam cleaners remove stubborn compound using high-pressure vapor without chemical additives.
Where to start: Beginners should choose a ten-power corrected loupe, a balance scale reading to hundredths of a carat, and a basic electronic stone tester. Add an ultrasonic tank as volume grows.
Built by instrument makers
We machine, assemble, and calibrate workshop tools with real bench experience behind every design.
I have an Ultrasonic jewelry cleaner and have used these premeasured packets to clean bracelets, necklaces, and earrings. They have always come out clean and sparkling. I like that I don't have to measure out from a bottle of solution.
I'm addicted to it I got this to clean my engagement ring because I spoke to the jewelry and he said steam was the best. Omg it gets all of my jewelry so clean and I feel better not using harsh chemicals. A great investment, very portable.
Great jewelry cleaner. I'm a jewelry photographer so I need to make sure all the dust and dirt from manufacturer is off the pieces before I photograph them. This cleaner does the job! Great value for the money and a little bit goes a long way. Would highly recommend.
Equip your jewelry bench today
Pick the bench you are working at, read what the instrument actually does, and buy it from the retail partner that stocks our catalog.