• Sparkwise™ - 50% OFF TODAY

  • Sparkwise gem tester
  • Sparkwise Tester pen + 10X cutting mirror kit (no battery)
  • Sparkwise Tester pen + 10X cutting mirror kit + 9V battery
  • Sparkwise Tester pen + 30X triplet loupe
  • Sparkwise Tester pen + 10X cutting mirror kit (no battery)
  • Sparkwise Tester pen + 10X cutting mirror kit + 9V battery
  • Sparkwise Tester pen + 30X triplet loupe
 Rated 4.8 Excellent - Trusted By 17,000+

Sparkwise ™

$139.99
$139.99
SAVE Liquid error (snippets/price line 116): Computation results in '-Infinity'% Sold out
 

check_circle Catch obvious fakes then inspect up close

check_circle Stop wondering about that online order

check_circle Hear the beep and count the lights

check_circle Know which old rings deserve a closer look

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  • Install a 9V battery and slide the switch to power on.
  • Wait for the ready lamp, then find your light count on the back chart.
  • Touch the probe to the stone and count the lights.
  • Look closer with your loupe or cutting mirror.

  • Diamond tester pen (2nd generation)
  • Carry pouch
  • Probe cap
  • Loose-diamond tray
  • Your choice of kit: 10X cutting mirror with gray drawstring pouch and base stand, 30X triplet loupe in a hard case, or 60X microscope loupe with small black pouch
  • One 9V battery (cutting mirror plus battery option only)

Once your item/s is dispatched,
the estimated delivery time is:

- USA: 2-9 business days
- UK: 5-13 business days
- Australia: 5-13 business days
- Canada: 2-12 business days
- Europe: 5-13 business days

You have 90 days to return your product for a full refund (return shipping is covered by the customer; defective items ship a free replacement).

✓ Official Authorized Retailer

This product is not available on Amazon or eBay. You are purchasing directly from the only authorized seller — which means full warranty, verified authenticity, and dedicated customer support. Beware of counterfeit listings on third-party marketplaces.

Sparkwise gem tester

Sparkwise

 4.8/5
View full details

  • Over 17,000 recommend Sparkwise

Built for quick, clear answers

equalizer

Answer in lights and a beep

Read the result at a glance. Nine or more lights plus a beep means real diamond; fewer lights or no sound means fake.

thermostat

Readings matched to your room

The chart on the back maps room temperature and diamond weight to the light count, so you know what to look for.

Sparkwise
grid_view

A place to rest loose stones

Rest a loose stone while you check it. The tray is a flat strip with 4 holes of different sizes.

straighten

Carry it to the table or the sale

Take it where the stones are. The pen is 15.5 x 4 cm (6.10 x 1.57 in), 96 g (3.4 oz), with a carry pouch.

Frequently Asked Questions

verified +347 experts reviewed it as the best choice in 2026
Q1 Does it tell diamond from moissanite?
Not reliably. The pen reads how a stone responds to heat, and moissanite responds much like diamond, so a pass doesn't rule it out. Use your loupe or mirror to look at the stone up close, too.
Q2 What battery does it take?
One 9V battery (6F22) in the rear compartment, no USB. Only the cutting mirror plus battery option comes with one; with the other kits, pick up a 9V battery.
Q3 What if the lights don't reach the top?
No need to worry yet. Check the chart on the back first, since the count depends on room temperature and the diamond's weight. Nine or more lights plus a beep reads as real diamond; fewer lights or no beep reads as fake.
Q4 Can I check a stone that's set in a ring?
The cutting mirror kits are made for rings: hold the mirror vertically over the center of the ring and place its base there.
Q5 Which kit fits how I'll use it?
The 10X cutting mirror is made for ring checks. The 30X loupe folds into a hard case. The 60X has a built-in light button. The battery option arrives with a 9V so you can start right away.
Q6 How big is the pen?
The pen is 15.5 x 4 cm (6.10 x 1.57 in) and weighs 96 g (3.4 oz). The cutting mirror kit adds a mirror 7.1 cm (2.79 in) tall, 34 g (1.2 oz). Measure your case against the pen's length.
Q7 Can it check stones other than diamonds?
Yes. Besides diamond, the tester measures crystal, jadeite and jade. Pair any reading with your loupe or mirror so you can look at the stone up close, too.
Q8 Is it easy for a first-timer?
Yes, it's a short routine. Install a 9V battery, slide the switch, wait for the ready lamp, check the chart on the back, touch the probe to the stone, then count the lights.
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