Analytical and Precision Balances
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Lab Balances by Readability |
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Manufacturers |
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Diamond Scales |
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Diamond scales are designed for exceptional accuracy, often with a readability of 0.001 carat (ct) or even 0.0001 ct. This is necessary because even slight variations in weight can significantly impact a diamond's value.
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The Indispensable Tool of Gemology: Diamond Scales
Within the realm of gemology, diamond scales play a critical role in accurately determining the weight of diamonds, a crucial factor influencing their value. These specialized instruments operate with a level of precision far exceeding everyday weighing devices.
Unlike traditional scales, diamond scales prioritize exceptional readability. They typically offer a minimum readability of 0.001 carat (ct), with some high-end models reaching an astonishing 0.0001 ct. This level of detail is paramount because even minute weight variations can significantly impact a diamond's price.
The design of diamond scales reflects their specific application. Compact and portable, they are ideally suited for use in jewelry workshops and can be easily transported for appraisals or auctions. Additionally, their small platforms minimize the potential for errors caused by vibrations on larger weighing surfaces.
Advanced features further enhance the functionality of diamond scales. The tare function allows for zeroing out the weight of any container or packaging, ensuring precise measurement of the diamond itself. Some models offer the versatility of displaying weight in multiple units, such as grams (g), milligrams (mg), and carats (ct), catering to international clientele.
Calibration is essential for maintaining the accuracy of diamond scales. These instruments utilize calibration weights of known mass to ensure precise readings. Regular calibration intervals are established by the manufacturer and strictly adhered to by professional users.
Diamond scales are not commonplace equipment. Due to their high precision and delicate nature, they are primarily employed by gemologists and jewelers. Their expertise allows for the proper handling, calibration, and interpretation of weight measurements. These specialized tools contribute significantly to the accurate valuation of diamonds, ensuring both transparency and fairness in the gem trade.
In conclusion, diamond scales, though unassuming, are an indispensable tool in the world of gemology. Their remarkable precision, tailored design, and advanced features empower professionals to accurately assess the weight of diamonds, a cornerstone of diamond valuation.
The Best Diamond Scales and Balances
Diamond Scales |
Series |
Ohaus SJX323N/E |
Ohaus SPJ202 |
Ohaus TAJ203 |
Ohaus PAJ1003CN |
Rice-Lake TP-220 |
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Price From |
$499.95
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$244.39
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$2,187.57
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$909.48
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Capacity X Readability |
64 x 0.001 g 320 x 0.01 ct |
200 x 0.01 g 1000 x 0.05 ct |
40 g x 1 mg 200 x 0.005 ct |
1050 x 0.001 ct |
220 x 0.001 g 1,100 x 0.01 ct |
Legal for Trade |
64 x 0.01 g 320 x 0.1 ct |
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1050 x 0.01 ct |
- |
Pan Size |
Ø3.7 in / Ø93 mm |
Ø4.7 in |
Ø 3.5 in / Ø90 mm |
Ø 3.5 in / Ø90 mm |
Ø 4.6 in |
Interface |
Optional USB, RS-232, Ethernet, Bluetooth |
Optional RS232, USB |
Optional RS232, USB |
RS-232 |
RS-232, USB |
Selectable Units |
g, kg, ct, oz, ozt, dwt, lb, grn |
g, ct, oz, dwt, tical, tola, baht, grain, mesghal, oz t, 3 teal units Hong Kong, Singapore, Taiwan) |
g, ct, oz, dwt, tical, tola, baht, grain, mesghal, oz t, teals (Hong Kong, Singapore, Taiwan) |
g, mg, ct, oz, ozt, gn, dwt |
g, ct, lb, oz, d, GN, ozt, dwt, MM, TI.T, TL.C, TL.t, t, N, g2 |
Calibration |
External |
External |
External |
External |
External |
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More info Models |
more info |
more info |
more info |
more info |
Series |
Aczet CZ 153 |
Tanita 1230 |
Tanita KP601 |
Sartorius GCL1103i-2S |
Sartorius GCL603i-2S |
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Price From |
$365.04
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$239.95
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$299.00
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$1,624.00
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$1,575.00
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Capacity X Readability |
150 g x 0.001 g 750 x 0.005 ct |
20 x 0.002 g 100 x 0.01 ct |
100 x 0.002 g 500 x 0.01 ct |
1100 x 0.001 ct |
600 x 0.001 ct |
Legal for Trade |
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Pan Size |
Ø 120 mm Ø 4.7 in |
Ø 45 mm |
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Ø 90 mm |
Ø 90 mm |
Interface |
RS232 |
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USB, RS-232 |
USB, RS-232 |
Selectable Units |
g, ct, lb, oz, d, gn, ozt, dwt, mommes, grain, t, Hong Kong , Singapore , Taiwan Taels,bt, n |
ct, ozt, grain, g |
carat, gram, ounce, troy ounce, penny weight, and grain |
ct |
ct |
Calibration |
External |
External |
External |
Internal |
Internal |
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More info Models |
More Info. |
More Info. |
More Info. |
more info |
Series |
Ohaus PR323N/E |
Ohaus PR523N/E |
Ohaus PR523N |
AND Weighing EJ-54D2 |
AND Weighing EJ-123 |
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Price From |
$1,162.80
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$1,481.55
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$1,717.00
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$396.90
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$302.40
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Capacity X Readability |
320 x 0.001g 1600 x 0.005 ct |
520 x 0.001g 2600 x 0.005 ct |
520 x 0.001g 2600 x 0.005 ct |
22 g x 0.0002 g 52 g x 0.001 g 110 x 0.00001 ct 260 x 0.005 ct |
120 x 0.001 g 600 x 0.005 ct |
Legal for Trade |
320 x 0.01g |
520 x 0.01g |
520 x 0.01g |
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Pan Size |
Ø 4.72 in. / 120 mm |
Ø 4.72 in. / 120 mm |
Ø 4.72 in. / 120 mm |
Ø 50 mm |
Ø 110 mm |
Interface |
RS-232 (USB,Ethernet) |
RS-232 (USB,Ethernet) |
RS-232 (USB,Ethernet) |
RS-232 |
optional RS-232,USB |
Selectable Units |
g, mg, ct, dwt, grain, oz, ozt |
g, mg, ct, dwt, grain, oz, ozt |
g, mg, ct, dwt, grain, oz, ozt |
G, oz, ozt, ct, mom, dwt, GN, tl (Hong Kong General), tola |
G, oz, ozt, ct, mom, dwt, GN, tl (Hong Kong General), tola |
Calibration |
External |
External |
Internal |
External |
External |
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More info |
More info |
More Info. |
More Info. |
more info |
Series |
AND Weighing Apollo |
ohaus Adventurer |
Adam Luna |
Aczet CY |
Vibra HT |
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Price From |
$1,990.80
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$4,035.80
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$1,265.75
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$950.47
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$1,179.36
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Capacity X Readability |
220 x 0.0001 g 320 x 0.0001 g 120 x 0.001 g 220 x 0.001 g 320 x 0.001 420 x 0.001 g 620 x 0.001 g 1100 x 0.001 g 1620 x 0.001 g |
82 x 0.00001 g 120 x 0.0001 g 220 x 0.0001 g 120 x 0.0001 220 x 0.0001 320 x 0.0001 |
80 g x 0.1 mg 120 g x 0.1 mg 210 g x 0.1 mg 250 g x 0.1 mg 220 g x 1 mg 420 g x 1 mg 620 g x 1 mg 820 g x 1 mg |
60 g x 0.1 mg 120 g x 0.1 220 g x 0.1 mg 300 g x 0.1 mg 200 g x 0.01 mg |
80 g x 0.1 mg 120 g x 0.1 mg 220 g x 0.1 mg 220 g x 0.1 mg |
Legal for Trade |
122 x 0.001 g 220 x 0.001 g 320 x 0.001 g 120 x 0.01 g 220 x 0.01 g 320 x 0.01 g 420 x 0.01 g 620 x 0.01 g |
220 x 0.01 g 320 x 0.01 g 620 x 0.01 g |
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Pan Size |
Ø 90 mm 128 mm x 128 mm |
Ø 3.1 in / 80 mm Ø 3.5 in / 90 mm |
Ø3.5 in / 90 mm Ø 4.7 in/ 120 mm |
Ø 90 mm Ø 70 mm |
Ø 3.15 in Ø 80 mm |
Interface |
USB, RS-232 |
USB, RS-232 |
USB, RS-232 |
RS232C |
USB, RS-232 |
Selectable Units |
g, oz, lb, lb-oz, ozt, ct, mom, dwt, gr, pcs), %, SG , Custom |
B, ct, gr, g, mg, mesg, mm, N, oz, dwt, lb, Tael (HK), Tael (SG), Tael (TW), tl, tola, ozt, custom |
mg, g, ct, GN, N, dr, oz, ozt, dwt, mm, tl.T, tl.H, tl.S, T, custom unit |
gram, ounce, troy ounce, grain, pennyweight, carat, Milligram ,momme, mesghal, Hong Kong tales, Singapore taels, Taiwan tales, baht |
g, mg, ct, oz, lb, oz t, dwt, GN, momme |
Calibration |
Internal External |
Internal External |
Internal External |
Internal External |
Internal External |
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More Info. |
More Info. |
More Info. |
more info |
more info |
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