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Gem-Knight Aquamarine
Yu-Gi-Oh · Secret Rare

Gem-Knight Aquamarine

HA05-EN020Hidden Arsenal 5: Steelswarm Invasion
$1.21
-$0.13-9.7% · 30D
Aggregated from verified sold data · eBay, TCGplayer & PriceCharting
Where these prices come from

Yu-Gi-Oh prices on TCGIndex are TCGplayer market prices (the US market), in US dollars, with graded and sold prices from PriceCharting and eBay. Another currency is a conversion from USD at the day's rate, not a European market price. We do not use Cardmarket or Cardtrader prices for Yu-Gi-Oh.

Market Health
Neutral
Softening
Confidence
77/100
High reliability
Liquidity
Medium
Moderate activity
Sales Volume
33 / yr
Sold per year, updated 2h ago
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Before the price moves

We find the Yu-Gi-Oh cards about to rise.

Every night the model scores every Yu-Gi-Oh! card on the market. Every morning at 07:30 UTC it publishes the one most likely to gain 10% within 30 days, with its entry price and the reasons, then scores it in public.

Hit +10%
53%
Average return, day 30
+16.8%
Picks scored
145

Last 90 days, live picks only, losses included.

Picked before they moved
Assault Blackwing - Kusanagi the Gathering Storm (Starlight Rare)
+232.5%
Assault Blackwing - Kusanagi the Gathering Storm (Starlight Rare)
$11.87 → $39.47
Superdreadnought Rail Cannon Gustav Rocket (Starlight Rare)
+127.7%
Superdreadnought Rail Cannon Gustav Rocket (Starlight Rare)
$14.84 → $33.79
Mulcharmy Meowls
+98.7%
Mulcharmy Meowls
$10.17 → $20.21
See today’s Yu-Gi-Oh! pick

Published this morning, public in 14 days. Full record

Price & Volume
Market price Sales volume
Jul 2026 – today
Sales & Liquidity
Market Price$1.21
7-Day Change-6.2%
90-Day Change-17.1%
LiquidityMedium
Market TrendFalling
Price by Grade
BGS 10$77·
PSA 10$59·
SGC 10$35·
CGC 10$24·
PSA 9$9·
Raw· 33 sales$1▼
Price by Condition · 8
Anchored to market price · condition spread from TCGplayer
Near Mint
1st Edition · English
$1.21
-4.0%
Near Mint
Unlimited · English
$0.78
-10.3%
Lightly Played
1st Edition · English
$0.83
-9.8%
Lightly Played
Unlimited · English
$0.60
-25.9%
Moderately Played
1st Edition · English
$0.83
-2.4%
Heavily Played
1st Edition · English
$0.50
+0.0%
Heavily Played
Unlimited
$0.27
Damaged
1st Edition · English
$0.42
-28.8%

Gem-Knight Aquamarine price history

Near Mint market price on the dates below, from TCGIndex's daily record (58 days tracked). High $1.64 on Jan 2026, low $1.21 on Nov 2026.

WhenPricevs today
Today$1.21
7 days ago$1.29-6.2%
30 days ago$1.34-9.7%
90 days ago$1.46-17.1%
6 months ago$1.46-17.1%
MonthMonth-end price
Jan 2026$1.62
Feb 2026$1.58
Mar 2026$1.42
Apr 2026$1.44
May 2026$1.45
Jun 2026$1.44
Jul 2026$1.48
Aug 2026$1.59
Sep 2026$1.52
Oct 2026$1.29
Nov 2026$1.21

Gem-Knight Aquamarine PSA 10 price and graded values

What Gem-Knight Aquamarine (Hidden Arsenal 5: Steelswarm Invasion) sells for by grade, from verified sold listings. A PSA 10 sells for $59.06 against $1.21 raw, a 49x grading premium. PSA 9 copies trade around $9.00.

GradeMarket price
Raw (ungraded)$1.21
PSA 9$9.00
CGC 10$24.00
SGC 10$35.00
PSA 10$59.06
BGS 10$77.00

Graded prices: PriceCharting sold data, refreshed daily. Grading costs, turnaround and the odds of a 10 decide whether the premium is worth chasing. Most valuable Yu-Gi-Oh PSA 10 cards

Gem-Knight Aquamarine FAQ

How much is Gem-Knight Aquamarine worth right now?
Gem-Knight Aquamarine from Hidden Arsenal 5: Steelswarm Invasion is trading around $1.21 raw (ungraded) on the secondary market, and around $59.06 as a PSA 10. TCGIndex refreshes this price every day.
How much is Gem-Knight Aquamarine PSA 10 worth?
A PSA 10 Gem-Knight Aquamarine sells for around $59.06, a PSA 9 around $9.00, against $1.21 for a raw copy. These are market prices from verified sold listings, updated daily.
Is Gem-Knight Aquamarine worth grading?
A PSA 10 Gem-Knight Aquamarine is worth about 49 times the raw price ($59.06 vs $1.21). Grading pays off when the gap covers the grading fee and the risk of a 9 ($9.00): at $1.21 raw the grading fee costs more than the card itself, so it pays only for a copy you expect to come back a 10.
Is Gem-Knight Aquamarine going up or down?
Gem-Knight Aquamarine is down 9.7% over 30 days, down 6.2% over 7 days. The full price history is on this page.
Is Gem-Knight Aquamarine a good investment?
TCGIndex doesn't give financial advice, but here's the data worth knowing: it sits around $1.21, down 9.7% over the last 30 days, with low volatility. Prices can move fast, so look at the trend and your own timeframe before you buy. TCGIndex publishes one Yu-Gi-Oh pick every morning; each pick becomes public 14 days later and is scored at day 30.

Other printings of Gem-Knight Aquamarine

Gem-Knight Aquamarine has 2 other priced printings, from $0.19 to $2.09. Cheapest first.

More cards from Hidden Arsenal 5: Steelswarm Invasion

Hidden Arsenal 5: Steelswarm Invasion - Special EditionBrionac, Dragon of the Ice BarrierGem-ArmadilloCaam, Serenity of GustoGem-Knight RubyGungnir, Dragon of the Ice BarrierGem-Knight GarnetVylon EpsilonDaigusto EgulsGem-Knight SapphireGishki AbyssGem-Knight FusionVylon CubeGem-Knight TourmalineGem-Knight AlexandriteEvigishki Mind AugusSteelswarm CaucastagGem-Knight TopazLavalval DragonGem-EnhancementLaval the GreaterGishki AquamirrorEvigishki Soul OgreVylon Sigma
View the full Hidden Arsenal 5: Steelswarm Invasion set →