How can I tell if a gemstone is authentic?

This applies for most of them, but I have a personal interest in moldavite, which is a tektite found in eastern Europe

There is no one test you can use on any stone. There are many tests, some as simple as examining the stone under a microscope. Even then, you’re looking for different things depending on what kind of stone it is.

The best and surest way to tell if a stone is authentic is to take it to a jeweler and let him/her look at it. Many are trained as gemologists and know what to look for.

moldavite #1

Green Czech Moldavite Tektite – 48 Carat $45.00

8MM MOLDAVITE JEWELRY NATURAL TEKTITE TRILLIANT PENDANT $93.74

10MM MOLDAVITE JEWELRY NATURAL GENUINE TEKTITE PENDANT $268.99

MOLDAVITE TEKTITE CRYSTAL HEART JEWELRY RING SIZE 4-9 $42.74

MOLDAVITE TEKTITE CRYSTAL HEART JEWELRY RING SIZE 4-9 $57.74

4X6MM STERLING SILVER MOLDAVITE TEKTITE OVAL EARRINGS $36.74

2″ A+ MOLDAVITE NATURAL HEALING GEMSTONE TEKTITE ROUGH CZECH REPUBLIC 4.6 GRAMS $44.24

.9″ A+ MOLDAVITE NATURAL HEALING GEMSTONE TEKTITE ROUGH CZECH REPUBLIC 10 GRAMS $96.74

Czech Moldavite Green Meteorite Tektite Pendant – MT778 $36.95

Moldavite,Bohemian green Tektite,superb collector grade $43.00

Moldavite,Moravian green Tektite, collector grade, rare localisation, 19g $295.00

15.10ct or 3.00g Czech Natural Raw Rough Moldavite Tektite Crystal Specimen #10 $23.95

MOLDAVITE * NATURE SCULPTURED GREEN TEKTITE * SUPER !!! Chlum, CZECH REPUBLIC $29.99

4.45 Ct Dazzling Extreme Good Sparkling Green Tektite Moldavite $13.50

Soul Art Synergy Crystal Pendant #8 Moldavite Scolecite Tibetan Tektite Reiki $69.99

Apple Green Moldavite Tektite Gem Rough For Faceting #9 $59.95

POWERFUL MOLDAVITE! TRIANGULAR SHAPE! METEORITE TEKTITE! METEOR SHOWER CHARGED! $17.77

HUGE & POWERFUL MOLDAVITE! METEORITE TEKTITE! METEOR SHOWER CHARGED! ANGEL DROP! $133.33

POWERFUL MOLDAVITE! SCROLL SHAPE! METEORITE TEKTITE! METEOR SHOWER CHARGED! $17.77

1.01 Cts FLAWLESS RARE HUGE AAA GREEN TEKTITE MOLDAVITE $9.99

MOLDAVITE JEWELRY NATURAL TEKTITE ANKH PENDANT 1.5″ $64.99

MOLDAVITE JEWELRY NATURAL TEKTITE CELTIC CROSS PENDANT $56.24

MOLDAVITE NATURAL TEKTITE CRYSTAL JEWELRY RING SIZE 5-9 $59.24

15MM MOLDAVITE FACETED CUT ROUND SHAPE TEKTITE PENDANT $119.24

MOLDAVITE NATURAL TEKTITE CRYSTAL JEWELRY RING SIZE 4-9 $81.74

Hot, Apple Green Moldavite Gem Tektite Facet Rough #5 $29.95

Brite Apple Green Moldavite Tektite Loose Gemstones #5G $49.94

Natural Raw Czech Moldavite Tektite Gemstone 18.30Ct 18 $27.95

Charles Albert moldavite, meteorite, tektite silver pendant slide for necklace $158.00

170ct Green Tektite MOLDAVITE – XL DROP !!! Amazing “Teardrop” – Czech, Slavce $429.00

3.90 Ct Dazzling Extreme Good Lustrous Collection Green Tektite Moldavite $9.99

Moldavite Tektite made from huge Impactor Czech Republic by Meteorite Men Steve $5.99

Fine Oval Apple Green Moldavite Tektite Loose Gemstones $49.95

Fine Oct Apple Green Moldavite Tektite Loose Gemstones $53.95

26ct Green Moldavite from Czech prospector tektite rare $38.50

7.25″ Green Moldavite from Czech 925 sterling sliver ring tektite gemstone reiki $24.95

9.16 ct~FLAWLESS RARE TOP NATURAL AAA OCTAGON CUT TEKTITE MOLDAVITE $10.50

5 x Moldavite 27.8 ct / Tektite / Moldavit / Moldavites $24.75

3 x Moldavite 66.6 ct / Tektite / Moldavit / Moldavites $53.92

6MM .925 STRLNG SILVER MOLDAVITE TEKTITE HEART EARRINGS $51.74

8MM .925 STRLNG SILVER MOLDAVITE TEKTITE HEART EARRINGS $81.74

Superb, Apple Green Moldavite Tektite Gem Facet Rough! $448.95

23ct Green Moldavite from Czech prospector tektite rare $34.50

Green Czech Moldavite Tektite – 58 Carat $63.00

20 x Moldavite 56.5 ct / Tektite / Moldavit / Moldavites $54.90

Fine Green Moldavite Tektite Gem Rough For Faceting #6 $48.95

Sparkling Green Moldavite Tektite Loose Gemstones #6G $24.95

5 x Moldavite 41.0 ct / Tektite / Moldavit / Moldavites $39.90

Moldavite / Tektite / Tektite / Moldavit / Moldavites $9.90

5 x Moldavite 27.8 ct / Tektite / Moldavit / Moldavites $27.90

Moldavite / Tektite / Tektite / Moldavit / Moldavites $15.68

3 x Moldavite 47.0 ct / Tektite / Moldavit / Moldavites $49.90

MOLDAVITE * NATURE FINE SCULPTURED GREEN TEKTITE * RARE ! BRUSNA – CZECH REP $0.99

7.63 Ct Dazzling Extreme Good Sparkling Green Tektite Moldavite $15.50

Moldavite Tektite Crystal 13.5 carats Czech Republic Chakra Opener 02 $24.95

Moldavite Tektite Crystal 11 carats Czech Republic Chakra Opener 03 $20.95

Moldavite Tektite Crystal 28 carats Czech Republic Chakra Opener 04 $45.95

6.88 ct~FLAWLESS RARE STUNNING NATURAL AAA ROUND CUT TEKTITE MOLDAVITE $11.50

Superb Apple Green Moldavite Tektite Gem Facet Rough #7 $79.95

8.94 ct~FLAWLESS RARE TOP NATURAL AAA OCTAGON CUT TEKTITE MOLDAVITE $9.99

8.19 Ct Dazzling Extreme Good Sparkling Green Tektite Moldavite $12.00

6.55Cts- Extremely Top Luster Mystrey Tektite Chrome Green MOLDAVITE Gemstone $8.50

Premium Gem Quality Super GREEN Moldavite Gem Tektite Space Rock Meteorite $485.00

27ct Green Moldavite from czech prospector meteorite tektite top grade quality $39.50

29ct green moldavite from Czech prospector tektite meteorite 925 sliver pendant $49.50

32ct green moldavite from Czech prospector tektite meteorite 925 sliver pendant $62.13

28ct green moldavite from Czech prospector tektite meteorite 925 sliver pendant $49.50

10.20 ct~FLAWLESS RARE TOP NATURAL AAA OVAL CUT TEKTITE MOLDAVITE $9.99

MOLDAVITE TEKTITE 3 STONE DANBURITE CRYSTAL RING SZ4-10 $67.49

Moldavite 34.75 ct / Tektite / Moldavites $39.90

20 x Moldavite 61.25 ct / Tektite / Moldavit / Moldavites $39.90

3 x Moldavite 74.5 ct / Tektite / Moldavit / Moldavites $80.94

Pink Tourmaline Gem Herkimer Diamond Quartz & Moldavite Tektite Crystal Pendant $450.00

10 x Moldavite 25.75 ct / Tektite / Moldavit / Moldavites $25.19

2.85 Ct Amazing Extreme Good Lustrous Collection Green Tektite Moldavite $9.99

Fine Apple Green Moldavite Gem Tektite Facet Rough #1 $19.95

Fine Apple Green Moldavite Tektite Loose Gemstones #1G $19.21

35ct green moldavite from Czech prospector tektite meteorite 925 sliver pendant $61.50

7.14 ct~FLAWLESS RARE STUNNING NATURAL AAA ROUND CUT TEKTITE MOLDAVITE $9.99

Gem Moldavite Tektite Campo Del Cielo Meteorite Pendant $465.00

17.9 Ct MOLDAVITE TEKTITE PEAR, AA SPECIMEN GEMSTONE $184.00

10.34Cts. Mind Blowing Gem PC – Amazing Chrome Green Meteor MOLDAVITE Tektite $59.96

Brite Apple Green Moldavite Tektite Loose Gemstones #2G $38.95

10 x Moldavite 31.0 ct / Tektite / Moldavit / Moldavites $26.77

Charles Albert Moldavite, Meteorite & Tektite Sterling Silver Pendant $155.00

12.18Cts. Hi-End Luster Hot Rich Chrome Green Mystery TEKTITE MOLDAVITE $79.97

MOLDAVITE Green Tektite AAA Quality .925 Sterling Silver Pendant w/ Cord Czech 1 $31.99

MOLDAVITE Green Tektite AAA Quality .925 Sterling Silver Pendant w/ Cord Czech 2 $34.99

MOLDAVITE * FINE SCULPTURED LIGHT-GREEN TEKTITE * Chlum, CZECH REPUBLIC $2.25

1.50 Ct Extreme Good Sparkling Natural Tektite Green Moldavite $9.99

11.53 ct~FLAWLESS RARE TOP NATURAL AAA OVAL CUT TEKTITE MOLDAVITE $9.99

28ct green moldavite from Czech prospector tektite meteorite 925 sliver pendant $49.50

Sparkling Green Moldavite Tektite Loose Gemstones #7G $48.95

Great Green Moldavite Tektite Gem Rough for Faceting #8 $38.95

2 Round 6mm, Green Moldavite Tektite Loose Gemstones $58.95

Moldavite Raw Tektite Natural Form Silver Pendant & Chain 4.3 carats $55.00

28ct green moldavite from Czech Republic tektite meteorite 925 sliver pendant $42.00

.5″ A+ MOLDAVITE NATURAL HEALING GEMSTONE TEKTITE ROUGH CZECH REPUBLIC 1.1 GRAMS $4.03

9.1 Ct MOLDAVITE TEKTITE TRI Cut – Natural – AA GRADE $72.80

13+ Ct MOLDAVITE TEKTITE TEAR Cut SHOWING BUBBLE TRAILS $128.79