AUCTION  / 

Genuine Fine Gems, Jewelry, and Watches

Auction CurrencyUSD Auction Location606 S Hill St. Suite 607, Los Angeles, California, 90014, United States

Auction Details

Genuine Fine Gems, Jewelry, and Watches.

All lots are brand new unless stated in the description of the item. Lots are mostly Genuine Diamonds and/or Natural Gemstones. Most lots are in stock and ready to ship. Please see descriptions for more details or you can email us at: info@lagemsanddiamonds.com for questions, please indicate lot number and auction date as your email subject.

***We require working contact number and a valid credit card for ALL Bidders before the auction starts. A non-wo
< Prev# Rows102050100Next >123. . .2021222324. . .313233
 Choose Your Layout > Switch to Grid View Switch to List View
Uncirculated Wartime Nickel Set 1942-1945 (11pcs)233124761 - Uncirculated Wartime Nickel Set 1942-1945 (11pcs)
LA Gems and Diamonds
Uncirculated Wartime Nickel Set 1942-1945 (11pcs) **|**|** Uncirculated Wartime Nickel Set 1942-1945 (11pcs) ; MSRP: $400
Bidding Has Concluded
Estimate : 320.00 - 400.00
Sold to floor for 175.00
 
Details...Bookmark
LINCONL CENT G-VG 1927233225533 - LINCONL CENT G-VG 1927
LA Gems and Diamonds
LINCONL CENT G-VG 1927 **|**|** LINCONL CENT G-VG 1927 ; MSRP: $20
Bidding Has Concluded
Estimate : 15.00 - 20.00
Sold to floor for 50.00
 
Details...Bookmark
23.00 ctw Gold Plated silver Garnet Ring233226717 - 23.00 ctw Gold Plated silver Garnet Ring
LA Gems and Diamonds
23.00 ctw Gold Plated silver Garnet Ring **|**|** 23.00 ctw Gold Plated silver Garnet Ring ; MSRP: $225
Bidding Has Concluded
Estimate : 150.00 - 225.00
Sold to floor for 75.00
 
Details...Bookmark
1992 Ben Franklin Firefighters Silver Medal 1oz - Unc233326243 - 1992 Ben Franklin Firefighters Silver Medal 1oz - Unc
LA Gems and Diamonds
1992 Ben Franklin Firefighters Silver Medal 1oz - Unc **|**|** 1992 Ben Franklin Firefighters Silver Medal 1oz - Unc ; MSRP: $105
Bidding Has Concluded
Estimate : 95.00 - 105.00
Sold to floor for 80.00
 
Details...Bookmark
GENUINE 16\" 14K ITALIAN GOLD FANCY TINSEL CHAIN 10.7 g233421150 - GENUINE 16\" 14K ITALIAN GOLD FANCY TINSEL CHAIN 10.7 g
LA Gems and Diamonds
GENUINE 16\" 14K ITALIAN GOLD FANCY TINSEL CHAIN 10.7 g **|**|** GENUINE 16" 14K ITALIAN GOLD FANCY TINSEL CHAIN; WHITE OR YELLOW GOLD; 2....
Bidding Has Concluded
Estimate : 970.00 - 1,455.00
Sold to floor for 485.00
 
Details...Bookmark
1 oz New Zealand Gold .9999 Kiwi Round (W/ COA)233424041 - 1 oz New Zealand Gold .9999 Kiwi Round (W/ COA)
LA Gems and Diamonds
1 oz New Zealand Gold .9999 Kiwi Round (W/ COA) **|**|** 1 oz New Zealand Gold .9999 Kiwi Round (W/ COA) ; MSRP: $1985
Bidding Has Concluded
Estimate : 1,975.00 - 1,985.00
Sold to floor for 1,900.00
 
Details...Bookmark
0.77 CTW EGL CERT. DIAMOND I/SI2233424727 - 0.77 CTW EGL CERT. DIAMOND I/SI2
LA Gems and Diamonds
0.77 CTW EGL CERT. DIAMOND I/SI2 **|**|** 0.77 CTW EGL CERT. DIAMOND I/SI2; 6.14X6.1X3.43mm; Cut G; Polish VG; SYM G; Depht 56.1%;Table 60%; Fluo VERY
Bidding Has Concluded
Estimate : 11,200.00 - 14,000.00
Sold to floor for 2,150.00
 
Details...Bookmark
10 BLACK PEARL CZ BROOCH AUTHENTIC PHILIPPINE PEARL MET233426296 - 10 BLACK PEARL CZ BROOCH AUTHENTIC PHILIPPINE PEARL MET
LA Gems and Diamonds
10 BLACK PEARL CZ BROOCH AUTHENTIC PHILIPPINE PEARL MET **|**|** 10 BLACK PEARL CZ BROOCH AUTHENTIC PHILIPPINE PEARL METAL SILVER ; MSRP: $150
Bidding Has Concluded
Estimate : 100.00 - 150.00
Sold to floor for 50.00
 
Details...Bookmark
3 PEACH PEARLS WITH CZ SILVER BRACELET *** METAL: SILVE233524231 - 3 PEACH PEARLS WITH CZ SILVER BRACELET *** METAL: SILVE
LA Gems and Diamonds
3 PEACH PEARLS WITH CZ SILVER BRACELET *** METAL: SILVE **|**|** 3 PEACH PEARLS WITH CZ SILVER BRACELET *** METAL: SILVER; APPROXIMATELY 10 GRAMS ; MS
Bidding Has Concluded
Estimate : 250.00 - 300.00
Sold to floor for 50.00
 
Details...Bookmark
Chinese Silver Panda 2010233526282 - Chinese Silver Panda 2010
LA Gems and Diamonds
Chinese Silver Panda 2010 **|**|** Chinese Silver Panda 2010 ; MSRP: $100
Bidding Has Concluded
Estimate : 90.00 - 100.00
Sold to smittyspc for 80.50
 
Details...Bookmark
Natural 5 Oz Coin Fine Silver USA (5) One Dollar 2011233618451 - Natural 5 Oz Coin Fine Silver USA (5) One Dollar 2011
LA Gems and Diamonds
Natural 5 Oz Coin Fine Silver USA (5) One Dollar 2011 **|**|** Natural Coin Fine Silver USA ; One Dollar 2011 ; 5 Oz ; MSRP: $910
Bidding Has Concluded
Estimate : 910.00 - 2,050.00
Sold to floor for 250.00
 
Details...Bookmark
280 CTW Amethys and Tourmiline Cut fine ring .925 STERL233626370 - 280 CTW Amethys and Tourmiline Cut fine ring .925 STERL
LA Gems and Diamonds
280 CTW Amethys and Tourmiline Cut fine ring .925 STERL **|**|** 280 CTW Amethys and Tourmiline Cut fine ring .925 STERLING SILVER ; MSRP: $795
Bidding Has Concluded
Estimate : 530.00 - 795.00
Sold to floor for 150.00
 
Details...Bookmark
Certified Commemorative Half Dollar Maryland MS66 PCGS233727037 - Certified Commemorative Half Dollar Maryland MS66 PCGS
LA Gems and Diamonds
Certified Commemorative Half Dollar Maryland MS66 PCGS **|**|** Certified Commemorative Half Dollar Maryland MS66 PCGS ; MSRP: $750
Bidding Has Concluded
Estimate : 730.00 - 750.00
Sold to floor for 700.00
 
Details...Bookmark
2011 Silver 5oz. Glacier ATB233821721 - 2011 Silver 5oz. Glacier ATB
LA Gems and Diamonds
2011 Silver 5oz. Glacier ATB **|**|** 2011 Silver 5oz. Glacier ATB ; MSRP: $305
Bidding Has Concluded
Estimate : 285.00 - 305.00
Sold to floor for 225.00
 
Details...Bookmark
NOBLE BLACK PEARL CZ EARRINGS;233826080 - NOBLE BLACK PEARL CZ EARRINGS;
LA Gems and Diamonds
NOBLE BLACK PEARL CZ EARRINGS; **|**|** NOBLE BLACK PEARL CZ EARRINGS; ; MSRP: $300
Bidding Has Concluded
Estimate : 100.00 - 300.00
Sold to floor for 50.00
 
Details...Bookmark
Canadian Silver 1 oz Grizzly Bear 2011233921697 - Canadian Silver 1 oz Grizzly Bear 2011
LA Gems and Diamonds
Canadian Silver 1 oz Grizzly Bear 2011 **|**|** Canadian Silver 1 oz Grizzly Bear 2011 ; MSRP: $70
Bidding Has Concluded
Estimate : 65.00 - 70.00
Sold to floor for 70.00
 
Details...Bookmark
Canadian Silver 1 oz Wolf 2011234021698 - Canadian Silver 1 oz Wolf 2011
LA Gems and Diamonds
Canadian Silver 1 oz Wolf 2011 **|**|** Canadian Silver 1 oz Wolf 2011 ; MSRP: $105
Bidding Has Concluded
Estimate : 95.00 - 105.00
Sold to floor for 75.00
 
Details...Bookmark
OCTAGON CZ WHITE PEARL SILVER BRACELET***METAL: SILVER;234024615 - OCTAGON CZ WHITE PEARL SILVER BRACELET***METAL: SILVER;
LA Gems and Diamonds
OCTAGON CZ WHITE PEARL SILVER BRACELET***METAL: SILVER; **|**|** OCTAGON CZ WHITE PEARL SILVER BRACELET***METAL: SILVER; APPROXIMATELY 10GRAMS 8-INCH
Bidding Has Concluded
Estimate : 100.00 - 200.00
Sold to floor for 50.00
 
Details...Bookmark
FLOWER STEM BLACK PEARL BROOCH AUTHENTIC PHILIPPINE PEA234026300 - FLOWER STEM BLACK PEARL BROOCH AUTHENTIC PHILIPPINE PEA
LA Gems and Diamonds
FLOWER STEM BLACK PEARL BROOCH AUTHENTIC PHILIPPINE PEA **|**|** FLOWER STEM BLACK PEARL BROOCH AUTHENTIC PHILIPPINE PEARL METAL SILVER ; ...
Bidding Has Concluded
Estimate : 100.00 - 150.00
Sold to floor for 50.00
 
Details...Bookmark
90% Silver Mercury Dimes Roll (50 pcs.)234124111 - 90% Silver Mercury Dimes Roll (50 pcs.)
LA Gems and Diamonds
90% Silver Mercury Dimes Roll (50 pcs.) **|**|** 90% Silver Mercury Dimes Roll (50 pcs.) ; MSRP: $290
Bidding Has Concluded
Estimate : 250.00 - 290.00
Sold to floor for 175.00
 
Details...Bookmark
GENUINE 14K ITALIAN ROSE GOLD 2.70G ROLO CHAINS234226422 - GENUINE 14K ITALIAN ROSE GOLD 2.70G ROLO CHAINS
LA Gems and Diamonds
GENUINE 14K ITALIAN ROSE GOLD 2.70G ROLO CHAINS **|**|** GENUINE 14K ITALIAN ROSE GOLD 2.70G ROLO CHAINS METAL ROSE GOLD PURITY 14K ITALIAN TOTAL WEIG
Bidding Has Concluded
Estimate : 155.00 - 175.00
Sold to floor for 125.00
 
Details...Bookmark
EGL CERT. DIAMOND CUSHION 1.14 CTW I/VS1234226492 - EGL CERT. DIAMOND CUSHION 1.14 CTW I/VS1
LA Gems and Diamonds
EGL CERT. DIAMOND CUSHION 1.14 CTW I/VS1 **|**|** EGL CERT. DIAMOND CUSHION 1.14 CTW I/VS1 6.77X5.44X3.95 CUT: POLISH:EX SYMM:EX DEPTH:72.6% TABLE:62%
Bidding Has Concluded
Estimate : 8,936.00 - 11,170.00
Sold to floor for 4,100.00
 
Details...Bookmark
19.50 ctw Tanzanite Ring .925 Sterling Silver234226747 - 19.50 ctw Tanzanite Ring .925 Sterling Silver
LA Gems and Diamonds
19.50 ctw Tanzanite Ring .925 Sterling Silver **|**|** 19.50 ctw Tanzanite Ring .925 Sterling Silver ; MSRP: $765
Bidding Has Concluded
Estimate : 510.00 - 765.00
Sold to floor for 255.00
 
Details...Bookmark
Certified Commemorative Half Dollar Bridgeport MS65 PCG234227022 - Certified Commemorative Half Dollar Bridgeport MS65 PCG
LA Gems and Diamonds
Certified Commemorative Half Dollar Bridgeport MS65 PCG **|**|** Certified Commemorative Half Dollar Bridgeport MS65 PCGS ; MSRP: $450
Bidding Has Concluded
Estimate : 430.00 - 450.00
Sold to floor for 415.00
 
Details...Bookmark
2012 1/2 oz Gold Lunar Year of the Dragon (Series 2)234324055 - 2012 1/2 oz Gold Lunar Year of the Dragon (Series 2)
LA Gems and Diamonds
2012 1/2 oz Gold Lunar Year of the Dragon (Series 2) **|**|** 2012 1/2 oz Gold Lunar Year of the Dragon (Series 2) ; MSRP: $1085
Bidding Has Concluded
Estimate : 1,075.00 - 1,085.00
Sold to floor for 1,000.00
 
Details...Bookmark
Certified Uncirculated Silver Eagle 2012(S) (Struck at234424822 - Certified Uncirculated Silver Eagle 2012(S) (Struck at
LA Gems and Diamonds
Certified Uncirculated Silver Eagle 2012(S) (Struck at **|**|** Certified Uncirculated Silver Eagle 2012(S) (Struck at the San Francisco Mint) MS69 E
Bidding Has Concluded
Estimate : 180.00 - 260.00
Sold to floor for 60.00
 
Details...Bookmark
33.95 ctw White Owl shaped with saphire Ring .925 Ster234426711 - 33.95 ctw White Owl shaped with saphire Ring .925 Ster
LA Gems and Diamonds
33.95 ctw White Owl shaped with saphire Ring .925 Ster **|**|** 33.95 ctw White Owl shaped with saphire Ring .925 Sterling Silver ; MSRP: $330
Bidding Has Concluded
Estimate : 220.00 - 330.00
Sold to floor for 110.00
 
Details...Bookmark
MOTHER OF PEARL BLACK AND WHITE PEARL BANGLE *** METAL:234524237 - MOTHER OF PEARL BLACK AND WHITE PEARL BANGLE *** METAL:
LA Gems and Diamonds
MOTHER OF PEARL BLACK AND WHITE PEARL BANGLE *** METAL: **|**|** MOTHER OF PEARL BLACK AND WHITE PEARL BANGLE *** METAL: SILVER; 40 GRAMS ; MSRP: $500
Bidding Has Concluded
Estimate : 250.00 - 300.00
Sold to floor for 50.00
 
Details...Bookmark
Prussia 5 mark silver, 1891-1908, VF234526887 - Prussia 5 mark silver, 1891-1908, VF
LA Gems and Diamonds
Prussia 5 mark silver, 1891-1908, VF **|**|** Prussia 5 mark silver, 1891-1908, VF ; MSRP: $100
Bidding Has Concluded
Estimate : 80.00 - 100.00
Sold to floor for 50.00
 
Details...Bookmark
English Sovereign (King or Queen) Gold Coin Our Choice234621889 - English Sovereign (King or Queen) Gold Coin Our Choice
LA Gems and Diamonds
English Sovereign (King or Queen) Gold Coin Our Choice **|**|** English Sovereign (King or Queen) Gold Coin Our Choice ; MSRP: $525
Bidding Has Concluded
Estimate : 500.00 - 525.00
Sold to floor for 500.00
 
Details...Bookmark
14.20 ctw Tanzanite Ring .925 Sterling Silver234626757 - 14.20 ctw Tanzanite Ring .925 Sterling Silver
LA Gems and Diamonds
14.20 ctw Tanzanite Ring .925 Sterling Silver **|**|** 14.20 ctw Tanzanite Ring .925 Sterling Silver ; MSRP: $525
Bidding Has Concluded
Estimate : 350.00 - 525.00
Sold to floor for 175.00
 
Details...Bookmark
Presidential Dollars Martin Van Buren 2008-D 25 pcs (Ro234725518 - Presidential Dollars Martin Van Buren 2008-D 25 pcs (Ro
LA Gems and Diamonds
Presidential Dollars Martin Van Buren 2008-D 25 pcs (Ro **|**|** Presidential Dollars Martin Van Buren 2008-D 25 pcs (Roll) ; MSRP: $1000
Bidding Has Concluded
Estimate : 620.00 - 1,000.00
Sold to floor for 50.00
 
Details...Bookmark
Austria 100 Corona234821774 - Austria 100 Corona
LA Gems and Diamonds
Austria 100 Corona **|**|** Austria 100 Corona ; MSRP: $2100
Bidding Has Concluded
Estimate : 2,000.00 - 2,100.00
Sold to floor for 1,900.00
 
Details...Bookmark
21.00 CTW Amethyst and TANZANITE cut fine ring .925 STE234826367 - 21.00 CTW Amethyst and TANZANITE cut fine ring .925 STE
LA Gems and Diamonds
21.00 CTW Amethyst and TANZANITE cut fine ring .925 STE **|**|** 21.00 CTW Amethyst and TANZANITE cut fine ring .925 STERLING SILVER ; MSRP: $990
Bidding Has Concluded
Estimate : 660.00 - 990.00
Sold to floor for 165.00
 
Details...Bookmark
Singapore Gold 20th Ounce 1993 Rooster234924648 - Singapore Gold 20th Ounce 1993 Rooster
LA Gems and Diamonds
Singapore Gold 20th Ounce 1993 Rooster **|**|** Singapore Gold 20th Ounce 1993 Rooster ; MSRP: $300
Bidding Has Concluded
Estimate : 260.00 - 300.00
Sold to floor for 200.00
 
Details...Bookmark
79 CTW WHITE SIOPAO FLAT PEARL BRACELET235023948 - 79 CTW WHITE SIOPAO FLAT PEARL BRACELET
LA Gems and Diamonds
79 CTW WHITE SIOPAO FLAT PEARL BRACELET **|**|** 79 CTW WHITE SIOPAO FLAT PEARL BRACELET ; MSRP: $350
Bidding Has Concluded
Estimate : 100.00 - 350.00
Sold to floor for 50.00
 
Details...Bookmark
Complete Set US Proof Sets 1955-1964 (10 sets)235024752 - Complete Set US Proof Sets 1955-1964 (10 sets)
LA Gems and Diamonds
Complete Set US Proof Sets 1955-1964 (10 sets) **|**|** Complete Set US Proof Sets 1955-1964 (10 sets) ; MSRP: $775
Bidding Has Concluded
Estimate : 695.00 - 775.00
Sold to floor for 575.00
 
Details...Bookmark
GENUINE 14K ITALIAN YELLOW GOLD 5.08G ANCHOR CHAIN235026450 - GENUINE 14K ITALIAN YELLOW GOLD 5.08G ANCHOR CHAIN
LA Gems and Diamonds
GENUINE 14K ITALIAN YELLOW GOLD 5.08G ANCHOR CHAIN **|**|** GENUINE 14K ITALIAN YELLOW GOLD 5.08G ANCHOR CHAIN YELLOW METAL PURITY 14K ITALIAN TOTAL W
Bidding Has Concluded
Estimate : 260.00 - 280.00
Sold to floor for 230.00
 
Details...Bookmark
EGL CERT, 1.89 CTW DIAMOND MARQUISE D/SI2235026936 - EGL CERT, 1.89 CTW DIAMOND MARQUISE D/SI2
LA Gems and Diamonds
EGL CERT, 1.89 CTW DIAMOND MARQUISE D/SI2 **|**|** EGL CERT, 1.89 CTW DIAMOND MARQUISE D/SI2 11.76X6.02X4.42 MM CUT:;POLISH:VG;SYMM:VG;DEPTH:73.4%;TAB
Bidding Has Concluded
Estimate : 19,824.00 - 24,780.00
Sold to floor for 7,700.00
 
Details...Bookmark
10.32 CTW CZ MICRO PAVE SETTING SET .925 STERLING SILVE235027161 - 10.32 CTW CZ MICRO PAVE SETTING SET .925 STERLING SILVE
LA Gems and Diamonds
10.32 CTW CZ MICRO PAVE SETTING SET .925 STERLING SILVE **|**|** 10.32 CTW CZ SET .925 STERLING SILVER ; MSRP: $300
Bidding Has Concluded
Estimate : 200.00 - 300.00
Sold to floor for 110.00
 
Details...Bookmark
Uncirculated Mint Set 1972235124781 - Uncirculated Mint Set 1972
LA Gems and Diamonds
Uncirculated Mint Set 1972 **|**|** Uncirculated Mint Set 1972 ; MSRP: $225
Bidding Has Concluded
Estimate : 145.00 - 225.00
Sold to floor for 50.00
 
Details...Bookmark
Silver Britannia One Ounce 2012235221711 - Silver Britannia One Ounce 2012
LA Gems and Diamonds
Silver Britannia One Ounce 2012 **|**|** Silver Britannia One Ounce 2012 ; MSRP: $70
Bidding Has Concluded
Estimate : 65.00 - 70.00
Sold to floor for 50.00
 
Details...Bookmark
LAVENDER KISHI PEARL BROOCH; AUTHENTIC PHILIPPINE PEARL235226148 - LAVENDER KISHI PEARL BROOCH; AUTHENTIC PHILIPPINE PEARL
LA Gems and Diamonds
LAVENDER KISHI PEARL BROOCH; AUTHENTIC PHILIPPINE PEARL **|**|** LAVENDER KISHI PEARL BROOCH; AUTHENTIC PHILIPPINE PEARL ; MSRP: $300
Bidding Has Concluded
Estimate : 100.00 - 300.00
Sold to floor for 50.00
 
Details...Bookmark
Uncirculated Mint Set 1987235324312 - Uncirculated Mint Set 1987
LA Gems and Diamonds
Uncirculated Mint Set 1987 **|**|** Uncirculated Mint Set 1987 ; MSRP: $60
Bidding Has Concluded
Estimate : 50.00 - 60.00
Sold to floor for 50.00
 
Details...Bookmark
Australian Lunar Gold Twentieth Ounce Gold 1999 Rabbit235421767 - Australian Lunar Gold Twentieth Ounce Gold 1999 Rabbit
LA Gems and Diamonds
Australian Lunar Gold Twentieth Ounce Gold 1999 Rabbit **|**|** Australian Lunar Gold Twentieth Ounce Gold 1999 Rabbit ; MSRP: $190
Bidding Has Concluded
Estimate : 180.00 - 190.00
Sold to floor for 160.00
 
Details...Bookmark
27.45 CTW CZ RING .925 STERLING SILVER235427335 - 27.45 CTW CZ RING .925 STERLING SILVER
LA Gems and Diamonds
27.45 CTW CZ RING .925 STERLING SILVER **|**|** 27.45 CTW CZ RING .925 STERLING SILVER ; MSRP: $75
Bidding Has Concluded
Estimate : 50.00 - 75.00
Sold to floor for 50.00
 
Details...Bookmark
BUTTERFLY CZ PEACH PEARL SILVER BRACELET***METAL: SILVE235524605 - BUTTERFLY CZ PEACH PEARL SILVER BRACELET***METAL: SILVE
LA Gems and Diamonds
BUTTERFLY CZ PEACH PEARL SILVER BRACELET***METAL: SILVE **|**|** BUTTERFLY CZ PEACH PEARL SILVER BRACELET***METAL: SILVER; APPROXIMATELY 10GRAMS 8-INC
Bidding Has Concluded
Estimate : 100.00 - 200.00
Sold to floor for 50.00
 
Details...Bookmark
Uncirculated Mint Set 1968235524777 - Uncirculated Mint Set 1968
LA Gems and Diamonds
Uncirculated Mint Set 1968 **|**|** Uncirculated Mint Set 1968 ; MSRP: $225
Bidding Has Concluded
Estimate : 145.00 - 225.00
Sold to floor for 50.00
 
Details...Bookmark
French 20 franc Napoleon III Gold Coin, 1853-1870235621652 - French 20 franc Napoleon III Gold Coin, 1853-1870
LA Gems and Diamonds
French 20 franc Napoleon III Gold Coin, 1853-1870 **|**|** French 20 franc Napoleon III Gold Coin, 1853-1870 ; MSRP: $730
Bidding Has Concluded
Estimate : 680.00 - 730.00
Sold to floor for 400.00
 
Details...Bookmark
19.00 CTW Amethyst and Tourmiline Cut fine ring .925 ST235626376 - 19.00 CTW Amethyst and Tourmiline Cut fine ring .925 ST
LA Gems and Diamonds
19.00 CTW Amethyst and Tourmiline Cut fine ring .925 ST **|**|** 19.00 CTW Amethyst and Tourmiline Cut fine ring .925 STERLING SILVER ; MSRP: $1125
Bidding Has Concluded
Estimate : 750.00 - 1,125.00
Sold to floor for 125.00
 
Details...Bookmark