Diamond Simulated

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GR48w Clear Simulated Diamond Spiral Earrings
GR48w Clear Simulated Diamond Spiral Earrings
$0.95 (5 Bids)
Time Remaining: 31m

GR33w Sliver Plated Simulated Diamond Heart Earrings
GR33w Sliver Plated Simulated Diamond Heart Earrings
$1.75 (7 Bids)
Time Remaining: 32m

ROUND STONE CAGED IN 18k WGP NECKLACE 1181
ROUND STONE CAGED IN 18k WGP NECKLACE 1181
$14.75
Time Remaining: 34m
Buy It Now for only: $14.75

PRINCESS CUT PENDANT NECKLACE 18K WGP 1176
Princess Cut Pendant Necklace 18K WGP 1176
$14.75
Time Remaining: 34m
Buy It Now for only: $14.75

HEART ON FIRE PENDANT NECKLACE 1077
HEART ON FIRE PENDANT NECKLACE 1077
$19.75
Time Remaining: 36m
Buy It Now for only: $19.75

256C EXQUISITE VINTAGE STYLE WEDDING ENGAGEMENT RING SET DIAMOND simulated SZ 6
256C EXQUISITE VINTAGE STYLE Wedding Engagement Ring Set DIAMOND simulated SZ 6
$52.99
Time Remaining: 37m
Buy It Now for only: $52.99

GR13 Simulated Diamond Amethyst Heart  Butterfly Earrings
GR13 Simulated Diamond Amethyst Heart Butterfly Earrings
$5.06 (9 Bids)
Time Remaining: 47m

FLOWER SIMULATED DIAMOND STERLING SILVER PENDANT BRAND NEW
FLOWER SIMULATED DIAMOND Sterling Silver PENDANT BRAND NEW
$10.39
Time Remaining: 48m
Buy It Now for only: $10.39

SIMULATED DIAMOND STERLING SILVER STUDDED EARRING SET BRAND NEW
SIMULATED DIAMOND STERLING SILVER STUDDED Earring Set BRAND NEW
$11.99
Time Remaining: 48m
Buy It Now for only: $11.99

SIMULATED DIAMOND SEVEN STONE BAND STERLING SILVER RING SIZE 7 BRAND NEW
SIMULATED DIAMOND SEVEN STONE BAND STERLING Silver Ring SIZE 7 BRAND NEW
$11.99
Time Remaining: 48m
Buy It Now for only: $11.99

FOUR STONE JOURNEY SIMULATED DIAMOND STERLING SILVER PENDANT BRAND NEW
FOUR STONE JOURNEY SIMULATED DIAMOND STERLING Silver Pendant BRAND NEW
$13.59
Time Remaining: 48m
Buy It Now for only: $13.59

RN050 Oversize Elegant Gothic Style Big Simulated Diamond Ring
RN050 Oversize Elegant Gothic Style Big Simulated Diamond Ring
$0.01
Time Remaining: 50m

GR26g Simulated Diamond Emerald Spiral Earrings
GR26g Simulated Diamond Emerald Spiral Earrings
$1.90 (5 Bids)
Time Remaining: 50m

SZ 5 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
SZ 5 14K White Gold PLATED 15CT RUSSIAN Simulated Diamond Ring DESIGNER
$69.99
Time Remaining: 1h 5m
Buy It Now for only: $69.99

SZ 6 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
SZ 6 14K WHITE Gold Plated 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
$69.99
Time Remaining: 1h 7m
Buy It Now for only: $69.99

SZ 7 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
SZ 7 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
$69.99
Time Remaining: 1h 8m
Buy It Now for only: $69.99

SZ 8 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
SZ 8 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
$69.99
Time Remaining: 1h 9m
Buy It Now for only: $69.99

SZ 9 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
SZ 9 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
$69.99
Time Remaining: 1h 10m
Buy It Now for only: $69.99

SZ 5 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
SZ 5 14K WHITE GOLD PLATED 15CT RUSSIAN SIMULATED DIAMOND RING DESIGNER
$65.00
Time Remaining: 1h 11m

BRIOLITE 3CT 30mm HOOP ETERNITY SIMULATED DIAMOND EARRINGS
BRIOLITE 3CT 30mm HOOP ETERNITY SIMULATED Diamond Earrings
$37.99
Time Remaining: 1h 11m
Buy It Now for only: $37.99

Simulated Diamond 9K 9ct Solid White Gold Pendant  Italy Chain 45cm
Simulated Diamond 9K 9ct Solid White Gold Pendant Italy Chain 45cm
$213.95
Time Remaining: 1h 11m

Kenneth Jay Lane KJL Simulated Clear Diamond and Goldtone Clip on Earrings NEW
Kenneth Jay Lane KJL Simulated Clear Diamond and Goldtone Clip on Earrings NEW
$44.99
Time Remaining: 1h 13m

Nolan Miller Silvertone Clear Simulated Diamond Emerald Drop Earrings NEW
Nolan Miller Silvertone Clear Simulated Diamond Emerald Drop Earrings NEW
$36.99
Time Remaining: 1h 13m

5CT SILVER SIMULATED DIAMOND FRENCH Round Hoop EARRINGS
5CT SILVER SIMULATED DIAMOND FRENCH Round Hoop Earrings
$16.19
Time Remaining: 1h 21m
Buy It Now for only: $16.19

Simulated Diamond 9k 9ct Solid White Gold Ring Size P 775 W23475
Simulated Diamond 9k 9ct Solid White Gold Ring Size P 775 W23475
$306.95
Time Remaining: 1h 23m

1 dozen 5mm round 90 ctw Russian Simulated Diamonds
1 dozen 5mm round 90 ctw Russian Simulated Diamonds
$13.28
Time Remaining: 1h 30m
Buy It Now for only: $13.28

18K White Gold EP Simulated Diamond Wedding Engagement Ring Bridal Set Size 6
18K White Gold EP Simulated Diamond Wedding Engagement Ring Bridal Set Size 6
$16.00 (36 Bids)
Time Remaining: 1h 37m

24CT WEDDING ENGAGEMENT RING SET BRIDAL DIAMOND SIMULATED SZ 6 SALE SALE
24CT WEDDING ENGAGEMENT RING SET BRIDAL DIAMOND SIMULATED SZ 6 SALE SALE
$52.99
Time Remaining: 1h 37m
Buy It Now for only: $52.99

PINK HEART SIMULATED DIAMOND SILVER PENDANT NECKLACE
PINK HEART SIMULATED DIAMOND SILVER PENDANT NECKLACE
$16.19
Time Remaining: 1h 39m
Buy It Now for only: $16.19

Sterling Silver Mens Genuine Briolite Simulated Diamond Ring
Sterling Silver Mens Genuine Briolite Simulated Diamond Ring
$49.85
Time Remaining: 1h 41m

VTG AVON SET FAUX BLACK ONYX AND SIMULATED DIAMOND NECKLACE  DANGLE EARRINGS
VTG AVON SET FAUX BLACK ONYX AND SIMULATED DIAMOND NECKLACE Dangle Earrings
$9.99
Time Remaining: 1h 41m
Buy It Now for only: $12.99

BR2145P Swarovski CrystalSimulated Diamond Bracelet
BR2145P Swarovski CrystalSimulated Diamond Bracelet
$0.01
Time Remaining: 1h 44m

475 GOLD Mesh SIMULATED Diamond Rhinestone Ribbon Wrap Roll 1 yard
475 GOLD Mesh SIMULATED Diamond Rhinestone Ribbon Wrap Roll 1 yard
$3.95
Time Remaining: 1h 45m
Buy It Now for only: $3.95

9CT GOLD GF BA11 SIMULATED DIAMONDS LADY FILIGREE WEDDING SOLID BANGLE BRACELET
9CT GOLD GF BA11 SIMULATED DIAMONDS LADY FILIGREE WEDDING SOLID Bangle Bracelet
$22.54
Time Remaining: 1h 46m
Buy It Now for only: $22.54

HIGH HEEL SHOES SIMULATED DIAMOND 925 SILVER NECKLACE
HIGH HEEL SHOES SIMULATED DIAMOND 925 Silver Necklace
$16.19
Time Remaining: 1h 50m
Buy It Now for only: $16.19

Genuine Solid 9ct White Gold Engagement Wedding Esteem Rings Simulated Diamonds
Genuine Solid 9ct White Gold Engagement Wedding Esteem Rings Simulated Diamonds
$285.07
Time Remaining: 1h 57m
Buy It Now for only: $324.53

3 pcs Silver 925 Filigree Princess Simulated Diamond Tungsten Ring Set
3 pcs Silver 925 Filigree Princess Simulated Diamond Tungsten Ring Set
$66.99
Time Remaining: 1h 57m

Tuscany Pearl 18K White Gold Simulated Diamond Ring Size 5 G18
Tuscany Pearl 18K White Gold Simulated Diamond Ring Size 5 G18
$32.99
Time Remaining: 1h 58m
Buy It Now for only: $32.99

DOG PUPPY 925 SILVER SIMULATED DIAMOND NECKLACE PENDANT
DOG PUPPY 925 SILVER SIMULATED DIAMOND Necklace Pendant
$16.19
Time Remaining: 1h 59m
Buy It Now for only: $16.19

18K ROSE GOLD GP SIMULATED DIAMOND ENGAGEMENT WEDDING RING US 6 1 4 UK AU M 1 2
18K Rose Gold GP SIMULATED DIAMOND ENGAGEMENT Wedding Ring US 6 1 4 UK AU M 1 2
$12.62
Time Remaining: 2h 3m
Buy It Now for only: $12.62

150CT Brilliant Simulated Diamond Earrings Studs 14K
150CT Brilliant Simulated Diamond Earrings Studs 14K
$193.99
Time Remaining: 2h 4m

100CT Brilliant Simulated Diamond Earrings Studs 14K
100CT Brilliant Simulated Diamond Earrings Studs 14K
$173.99
Time Remaining: 2h 5m

200CT Brilliant Simulated Diamond Earrings Studs 14K
200CT Brilliant Simulated Diamond Earrings Studs 14K
$211.99
Time Remaining: 2h 6m

300CT Brilliant Simulated Diamond Earrings Studs 14K
300CT Brilliant Simulated Diamond Earrings Studs 14K
$229.99
Time Remaining: 2h 7m

Tungsten Sterling Silver 925 Marquise Simulated Diamond 3 Rings Set
Tungsten Sterling Silver 925 Marquise Simulated Diamond 3 Rings Set
$57.99
Time Remaining: 2h 7m

Simulated Diamond 9K 9ct Solid Yellow Gold Ring Size P  Drop Earrings  Pendant
Simulated Diamond 9K 9ct Solid Yellow Gold Ring Size P Drop Earrings Pendant
$556.95
Time Remaining: 2h 8m

1 2CT Brilliant Simulated Diamond Earrings Studs 14K
1 2CT Brilliant Simulated Diamond Earrings Studs 14K
$154.99
Time Remaining: 2h 8m

150CT Brilliant Simulated Diamond Earrings Studs 14K
150CT Brilliant Simulated Diamond Earrings Studs 14K
$193.99
Time Remaining: 2h 10m

100CT Brilliant Simulated Diamond Earrings Studs 14K
100CT Brilliant Simulated Diamond Earrings Studs 14K
$173.99
Time Remaining: 2h 10m

200CT Brilliant Simulated Diamond Earrings Studs 14K
200CT Brilliant Simulated Diamond Earrings Studs 14K
$211.99
Time Remaining: 2h 11m

300CT Brilliant Simulated Diamond Earrings Studs 14K
300CT Brilliant Simulated Diamond Earrings Studs 14K
$229.99
Time Remaining: 2h 12m

400CT Brilliant Simulated Diamond Earrings Studs 14K
400CT Brilliant Simulated Diamond Earrings Studs 14K
$259.99
Time Remaining: 2h 13m

Sterling Silver 925 Princess Simulated Diamond Tungsten 3 Rings Set
Sterling Silver 925 Princess Simulated Diamond Tungsten 3 Rings Set
$58.99
Time Remaining: 2h 14m

Silver 925 Filigree Simulated Diamond Tungsten Wedding 3 Rings Set
Silver 925 Filigree Simulated Diamond Tungsten Wedding 3 Rings Set
$58.99
Time Remaining: 2h 16m

Silver 925 Filigree Simulated Diamond Tungsten Matte Grooved 3 Rings Set
Silver 925 Filigree Simulated Diamond Tungsten Matte Grooved 3 Rings Set
$68.99
Time Remaining: 2h 18m

White Gold like Diamond simulate PAVE EARRING BLING 304
White Gold like Diamond simulate PAVE EARRING BLING 304
$10.00
Time Remaining: 2h 22m
Buy It Now for only: $10.00

BRILLIANT SIMULATED DIAMOND LINK TENNIS BRACELET 35CT
BRILLIANT SIMULATED DIAMOND LINK TENNIS BRACELET 35CT
$71.99
Time Remaining: 2h 25m

14K White Gold GB Silver Brilliant Cut Simulated Diamond 20ct Stud Earrings E49
14K White Gold GB Silver Brilliant Cut Simulated Diamond 20ct Stud Earrings E49
$14.99
Time Remaining: 2h 28m

Three Stone 18K White Gold Simulated Diamond Engagement Ring Size 5 G21
Three Stone 18K White Gold Simulated Diamond Engagement Ring Size 5 G21
$24.99
Time Remaining: 2h 28m

18K ROSE GOLD GP SIMULATED DIAMOND ENGAGEMENT WEDDING RING US 7 UK AU O
18K ROSE GOLD GP SIMULATED DIAMOND ENGAGEMENT WEDDING RING US 7 UK AU O
$14.98
Time Remaining: 2h 28m
Buy It Now for only: $14.98

sz 6 14K WG P 3 STONES MAN MADE RUSSIAN SIMULATED DIAMOND RING SET
sz 6 14K WG P 3 STONES MAN MADE RUSSIAN SIMULATED DIAMOND RING SET
$79.99
Time Remaining: 2h 30m
Buy It Now for only: $79.99

278CT CUSHION CUT SIMULATED DIAMOND ENGAGEMENT RING
278CT CUSHION CUT SIMULATED DIAMOND ENGAGEMENT RING
$3,990.00
Time Remaining: 2h 31m
Buy It Now for only: $3,990.00

Dangle pendant 14K Y GOLD Simulated DIAMOND Necklace 19
Dangle pendant 14K Y GOLD Simulated DIAMOND Necklace 19
$85.00
Time Remaining: 2h 35m

225CT WEDDING ENGAGEMENT RING SET BRIDAL DIAMOND SIMULATED SZ 6
225CT WEDDING ENGAGEMENT RING SET BRIDAL DIAMOND SIMULATED SZ 6
$52.99
Time Remaining: 2h 37m
Buy It Now for only: $52.99

Pink Saphire Ovl 210 ct Simulated Diamond Ring in Platinum Overlay Sterling S
Pink Saphire Ovl 210 ct Simulated Diamond Ring in Platinum Overlay Sterling S
$19.00
Time Remaining: 2h 39m
Buy It Now for only: $26.00

Leaves Simulated Diamond 18KT Pink Gold SS Pendant
Leaves Simulated Diamond 18KT Pink Gold SS Pendant
$24.00
Time Remaining: 2h 39m
Buy It Now for only: $24.00

Vintage 14 Karat Gold Filigree Simulated Diamond Ladies Ring
Vintage 14 Karat Gold Filigree Simulated Diamond Ladies Ring
$49.99 (2 Bids)
Time Remaining: 2h 39m

Vintage 10 Karat Gold Simulated Diamond Ladies Ring Marked ESEMCO
Vintage 10 Karat Gold Simulated Diamond Ladies Ring Marked ESEMCO
$49.99
Time Remaining: 2h 39m

Tuscany Pearl 18K White Gold Simulated Diamond Ring Size 6 G18
Tuscany Pearl 18K White Gold Simulated Diamond Ring Size 6 G18
$32.99
Time Remaining: 2h 42m
Buy It Now for only: $32.99

2 CT ASSCHER CUT Screw Back Simulated diamond Stud EARRINGS Solid 14K white GOLD
2 CT ASSCHER CUT Screw Back Simulated diamond Stud Earrings Solid 14K white GOLD
$160.00
Time Remaining: 2h 43m
Buy It Now for only: $188.00

Ladies Iced Out Simulated Diamond GoldTone BLING WATCH
Ladies Iced Out Simulated Diamond GoldTone BLING WATCH
$24.99
Time Remaining: 2h 43m

Wave 12gr Wide Simulated Diamond Sterling Silver RING size 6
Wave 12gr Wide Simulated Diamond Sterling Silver RING size 6
$43.00
Time Remaining: 2h 43m

Ladies Iced Out Simulated Diamond Goldtone BLING WATCH with Gemstone Bezel
Ladies Iced Out Simulated Diamond Goldtone BLING WATCH with Gemstone Bezel
$24.99 (2 Bids)
Time Remaining: 2h 45m

Royal 14K White Gold 34ct Simulated Diamond Engagement Ring Size 7 G19
Royal 14K White Gold 34ct Simulated Diamond Engagement Ring Size 7 G19
$28.99
Time Remaining: 2h 46m
Buy It Now for only: $28.99

BUTTERFLY Sterling SILVER Simulated Diamond Ring sz 8
BUTTERFLY Sterling SILVER Simulated Diamond Ring sz 8
$41.50
Time Remaining: 2h 46m

Ladies Iced Out Simulated Diamond Silvertone BLING WATCH
Ladies Iced Out Simulated Diamond Silvertone BLING WATCH
$24.99
Time Remaining: 2h 47m

Mens Iced Out Simulated Diamond  Black Gemstone Dial BLING Flashy Glitz WATCH
Mens Iced Out Simulated Diamond Black Gemstone Dial BLING Flashy Glitz WATCH
$24.99 (1 Bid)
Time Remaining: 2h 49m

Mens Iced Out Simulated Diamond Coppertone BLING Flashy Chronograph WATCH
Mens Iced Out Simulated Diamond Coppertone BLING Flashy Chronograph WATCH
$24.99
Time Remaining: 2h 51m

Lab Created Ruby Oct 130 Ct Simulated Diamond Ring in SS Size 7
Lab Created Ruby Oct 130 Ct Simulated Diamond Ring in SS Size 7
$11.00
Time Remaining: 2h 52m
Buy It Now for only: $18.00

Mens Iced Out Simulated Diamond Goldtone BLING Flashy Glitz WATCH
Mens Iced Out Simulated Diamond Goldtone BLING Flashy Glitz WATCH
$24.99
Time Remaining: 2h 54m

Mens Iced Out Simulated Diamond Goldtone BLING Flashy Glitz WATCH
Mens Iced Out Simulated Diamond Goldtone BLING Flashy Glitz WATCH
$24.99
Time Remaining: 2h 55m

Mens Iced Out Simulated Diamond Two Tone BLING WATCH
Mens Iced Out Simulated Diamond Two Tone BLING WATCH
$24.99
Time Remaining: 2h 57m

18K ROSE GOLD GP SIMULATED DIAMOND ENGAGEMENT WEDDING RING US 6 1 4 UK AU M 1 2
18K ROSE GOLD GP SIMULATED DIAMOND ENGAGEMENT WEDDING RING US 6 1 4 UK AU M 1 2
$14.19
Time Remaining: 2h 59m
Buy It Now for only: $14.19

LOVE CAT PIN GOLD TONE SIMULATED DIAMOND EYES
LOVE CAT PIN GOLD TONE SIMULATED DIAMOND EYES
$18.99
Time Remaining: 2h 59m
Buy It Now for only: $18.99

Ruby 150 ct Simulated Diamond Ring in SS Size 8 TGW 152 cts
Ruby 150 ct Simulated Diamond Ring in SS Size 8 TGW 152 cts
$12.00
Time Remaining: 3h 5m
Buy It Now for only: $20.00

Genuine Solid 9ct Rose Pink Gold Engagement Wedding Ring Band Simulated Diamond
Genuine Solid 9ct Rose Pink Gold Engagement Wedding Ring Band Simulated Diamond
$285.07
Time Remaining: 3h 8m
Buy It Now for only: $324.53

05CT PAVE PRINCESS RUSSIAN SIMULATED DIAMOND RING 6
05CT PAVE PRINCESS RUSSIAN SIMULATED DIAMOND RING 6
$35.99
Time Remaining: 3h 14m
Buy It Now for only: $35.99

SEXY big STAR SILVER SIMULATED DIAMOND PENDANT NECKLACE
SEXY big STAR SILVER SIMULATED Diamond Pendant NECKLACE
$16.19
Time Remaining: 3h 15m
Buy It Now for only: $16.19

18K ROSE GOLD GP SIMULATED DIAMOND ENGAGEMENT WEDDING BRIDAL RING US 55 AU L
18K ROSE GOLD GP SIMULATED DIAMOND ENGAGEMENT WEDDING BRIDAL RING US 55 AU L
$12.62
Time Remaining: 3h 18m
Buy It Now for only: $12.62

STUNNING 75 CT 14K White Gold Plated Simulated russian Diamond Ring set R56
STUNNING 75 CT 14K White Gold Plated Simulated russian Diamond Ring set R56
$5.00
Time Remaining: 3h 18m

THREE STONE 14K White Gold P 236 ct Simulated Russian Diamond Ring R86
THREE STONE 14K White Gold P 236 ct Simulated Russian Diamond Ring R86
$5.00
Time Remaining: 3h 18m

STUNNING 25CT 14K Gold Plated simulated Russian Diamond engagemen Ring set R66
STUNNING 25CT 14K Gold Plated simulated Russian Diamond engagemen Ring set R66
$5.00
Time Remaining: 3h 18m

Vintage Women of the Moose Brooch Heart Pin Simulated Diamonds Gold Tone WOTM
Vintage Women of the Moose Brooch Heart Pin Simulated Diamonds Gold Tone WOTM
$7.25
Time Remaining: 3h 22m

Sterling SILVER Simulated DIAMOND Wedding Rings size 7
Sterling SILVER Simulated Diamond Wedding Rings Size 7
$25.50
Time Remaining: 3h 25m

MENS  WOMENS TWO TONE SIMULATED DIAMONDS WEDDING RING SET 5 6 7 8 9 10 11 12 13
MENS WOMENS TWO TONE SIMULATED DIAMONDS WEDDING RING SET 5 6 7 8 9 10 11 12 13
$49.99
Time Remaining: 3h 27m
Buy It Now for only: $49.99

Smithsonian Reproduction CARMEN LICIA RUBY RING w Simulated Diamonds SZ 7 NIB
Smithsonian Reproduction CARMEN LICIA RUBY RING w Simulated Diamonds SZ 7 NIB
$29.99 (1 Bid)
Time Remaining: 3h 30m

GF10K YELLOW GOLD 3 CT SIMULATED DIAMOND ENGAGEMENT RING GENUINE CLEARANCE SALE
GF10K YELLOW GOLD 3 CT SIMULATED DIAMOND ENGAGEMENT RING GENUINE CLEARANCE SALE
$5.13 (9 Bids)
Time Remaining: 3h 33m

Earring Pendant 925 Sterling Silver Set with Peridot and Diamond Simulated CZ
Earring Pendant 925 Sterling Silver Set with Peridot and Diamond Simulated CZ
$57.97
Time Remaining: 3h 35m
Buy It Now for only: $57.97

Heart Cut Earring Pendant 925 Silver Set with Peridot and Diamond Simulated CZ
Heart Cut Earring Pendant 925 Silver Set with Peridot and Diamond Simulated CZ
$46.97
Time Remaining: 3h 35m
Buy It Now for only: $46.97

Pear Cut Earring Pendant 925 Silver Set with Peridot and Diamond Simulated CZ
Pear Cut Earring Pendant 925 Silver Set with Peridot and Diamond Simulated CZ
$88.97
Time Remaining: 3h 35m
Buy It Now for only: $88.97

Diamond Simulated
Will a simulated diamond test the same as a real diamond if a jeweller tests it?

I know that a jeweller will be able to tell the difference. I bought a simulated daimond, it is almost flawless. If I were to use a daimond tester on it would it test as real?

nope, a jeweler will know the difference.

Simulated Diamond Princess Cut